THERMOFLEX LUXURIOUS FLEECY WARMTH If you don't need the extra wet weather protection of Nano Flex, or if you've always been happy with traditional warmers, you'll find that Castelli's Thermoflex warmers offer the softest, most luxurious fabric combined with careful attention to construction details. WHAT IT IS Thermoflex is luxuriously warm and stretchy in dry conditions but is not intended for wet conditions. PRODUCT FEATURES Thermoflex fleece fabric is warm, stretchy and soft Single-piece construction with flat-lock seams Embossed Castelli wordmark logos Dual-sided silicone gripper elastic at top prevents sliding down 12°-20°C / 54°-68°F Weight:84 g
The new-for-2020 Sanremo RoS Thermosuit brings together two of our most functional and comfortable products: the upper part is based on the Perfetto RoS Long Sleeve jacket, while from the waist down you get the new Sorpasso RoS Tight. |If you're reading this then you're probably already familiar with both of those products, which offer our best mix of warmth, comfort, and protection from wind and light rain while remaining light and breathable. By literally joining these two products at the waist, we add a bit of comfort by eliminating some layers at the waist while also preventing cold air from coming in. Keeping the air out allows you to dress lighter. And, of course, in the stealth black colorway it looks like you mean business when you show up to the January group ride. What It Is Combining two of our best-performing products, the Perfetto RoS Long Sleeve with the Sorpasso RoS Bibtight, this suit brings our widest range of winter riding comfort. Why go for the one-piece suit? Eliminating the layers around the waist and the bib straps brings extra comfort, and the lack of an opening at the waist keeps you warmer by preventing cold air from coming in. Features: UPPER BODY: Castelli-exclusive GORE-TEX INFINIUM™ WINDSTOPPER® 205 Warm brushed water-resistant fabric on front-facing surfaces GORE-TEX INFINIUM™ WINDSTOPPER® 203 Stretch on rear-facing surfaces for extra stretch and breathability Taped reflective shoulder seams for extra rain protection YKK® Vislon® zipper for easy sliding, covered for greater wind and rain protection Zippered ventilation opening on side of chest 2 rear pockets with pump sleeve are easily accessed with gloved hands LOWER BODY: Nano Flex 3G fabric for our best mix of warmth, stretchy compression, softness and water repellency Nano Flex Xtra Dry fabric panel on upper front and thigh for increased warmth Anatomic cut to hip and knee Reflective panels at ankle for maximum visibility from behind YKK® Camlock® zipper at ankle 2°-12 °C / 36°-54°F Weight:524 g
The new-for-2020 Sanremo RoS Thermosuit brings together two of our most functional and comfortable products: the upper part is based on the Perfetto RoS Long Sleeve jacket, while from the waist down you get the new Sorpasso RoS Tight. |If you're reading this then you're probably already familiar with both of those products, which offer our best mix of warmth, comfort, and protection from wind and light rain while remaining light and breathable. By literally joining these two products at the waist, we add a bit of comfort by eliminating some layers at the waist while also preventing cold air from coming in. Keeping the air out allows you to dress lighter. And, of course, in the stealth black colorway it looks like you mean business when you show up to the January group ride. What It Is Combining two of our best-performing products, the Perfetto RoS Long Sleeve with the Sorpasso RoS Bibtight, this suit brings our widest range of winter riding comfort. Why go for the one-piece suit? Eliminating the layers around the waist and the bib straps brings extra comfort, and the lack of an opening at the waist keeps you warmer by preventing cold air from coming in. Features: UPPER BODY: Castelli-exclusive GORE-TEX INFINIUM™ WINDSTOPPER® 205 Warm brushed water-resistant fabric on front-facing surfaces GORE-TEX INFINIUM™ WINDSTOPPER® 203 Stretch on rear-facing surfaces for extra stretch and breathability Taped reflective shoulder seams for extra rain protection YKK® Vislon® zipper for easy sliding, covered for greater wind and rain protection Zippered ventilation opening on side of chest 2 rear pockets with pump sleeve are easily accessed with gloved hands LOWER BODY: Nano Flex 3G fabric for our best mix of warmth, stretchy compression, softness and water repellency Nano Flex Xtra Dry fabric panel on upper front and thigh for increased warmth Anatomic cut to hip and knee Reflective panels at ankle for maximum visibility from behind YKK® Camlock® zipper at ankle 2°-12 °C / 36°-54°F Weight:524 g
The Sorpasso RoS Bibtight from Castelli is made for long ride in the widest range of conditions. The tight features the ultra-stretchy, warm and water repellent Nano Flex 3G fabric. The fabric uses the third generation of Castellis nanotechnology fabric treatment that adds a high level of water repellency without affecting breathability, stretch or warmth. The fabric also offers a compressive fit that moves with you for all-day comfort. On the thighs and rear of the tights there are panels of Nano Flex Xtra Dry fabric to provide a bit more wind protection and warmth, as well as protection from any road spray. Its not only about the fabrics. Anatomical patterning gives a bend at the knee and the hip, while seamless bib straps lie flat and hold the tights and seat pad perfectly in place so you can concentrate on your efforts. Multiple reflective panels keep you visible and YKK Camlock zippers at the ankles make for easy on and lock and a secure closure. The Bibtight uses Castellis Progetto X2 seat pad. This pad features two isolated layers that work in tandem with your body and saddle to eliminate friction while still offering substantial cushioning whereitsneeded most. Key Features Rain or Shine engineering Nano Flex 3G fabric for the ideal mix of warmth, stretchy compression, softness, and water repellency Nano Flex Xtra Dry fabric panel on upper front and thighs for extra warmth, and on the back to protect from road spray Anatomic cut to hips and knees Reflective inserts for visibility from behind Lie-flat elastic bib straps YKK Camlock zippers at ankles Progetto X2 Air seamless seat pad for long hours in the saddle 0 12C / 32 54F Weight: 302g (Large)
The Sorpasso RoS Bibtight from Castelli is made for long ride in the widest range of conditions. The tight features the ultra-stretchy, warm and water repellent Nano Flex 3G fabric. The fabric uses the third generation of Castellis nanotechnology fabric treatment that adds a high level of water repellency without affecting breathability, stretch or warmth. The fabric also offers a compressive fit that moves with you for all-day comfort. On the thighs and rear of the tights there are panels of Nano Flex Xtra Dry fabric to provide a bit more wind protection and warmth, as well as protection from any road spray. Its not only about the fabrics. Anatomical patterning gives a bend at the knee and the hip, while seamless bib straps lie flat and hold the tights and seat pad perfectly in place so you can concentrate on your efforts. Multiple reflective panels keep you visible and YKK Camlock zippers at the ankles make for easy on and lock and a secure closure. The Bibtight uses Castellis Progetto X2 seat pad. This pad features two isolated layers that work in tandem with your body and saddle to eliminate friction while still offering substantial cushioning whereitsneeded most. Key Features Rain or Shine engineering Nano Flex 3G fabric for the ideal mix of warmth, stretchy compression, softness, and water repellency Nano Flex Xtra Dry fabric panel on upper front and thighs for extra warmth, and on the back to protect from road spray Anatomic cut to hips and knees Reflective inserts for visibility from behind Lie-flat elastic bib straps YKK Camlock zippers at ankles Progetto X2 Air seamless seat pad for long hours in the saddle 0 12C / 32 54F Weight: 302g (Large)
The Sorpasso RoS Bibtight from Castelli is made for long ride in the widest range of conditions. The tight features the ultra-stretchy, warm and water repellent Nano Flex 3G fabric. The fabric uses the third generation of Castellis nanotechnology fabric treatment that adds a high level of water repellency without affecting breathability, stretch or warmth. The fabric also offers a compressive fit that moves with you for all-day comfort. On the thighs and rear of the tights there are panels of Nano Flex Xtra Dry fabric to provide a bit more wind protection and warmth, as well as protection from any road spray. Its not only about the fabrics. Anatomical patterning gives a bend at the knee and the hip, while seamless bib straps lie flat and hold the tights and seat pad perfectly in place so you can concentrate on your efforts. Multiple reflective panels keep you visible and YKK Camlock zippers at the ankles make for easy on and lock and a secure closure. The Bibtight uses Castellis Progetto X2 seat pad. This pad features two isolated layers that work in tandem with your body and saddle to eliminate friction while still offering substantial cushioning whereitsneeded most. Key Features Rain or Shine engineering Nano Flex 3G fabric for the ideal mix of warmth, stretchy compression, softness, and water repellency Nano Flex Xtra Dry fabric panel on upper front and thighs for extra warmth, and on the back to protect from road spray Anatomic cut to hips and knees Reflective inserts for visibility from behind Lie-flat elastic bib straps YKK Camlock zippers at ankles Progetto X2 Air seamless seat pad for long hours in the saddle 0 12C / 32 54F Weight: 302g (Large)
The Sorpasso RoS Bibtight from Castelli is made for long ride in the widest range of conditions. The tight features the ultra-stretchy, warm and water repellent Nano Flex 3G fabric. The fabric uses the third generation of Castellis nanotechnology fabric treatment that adds a high level of water repellency without affecting breathability, stretch or warmth. The fabric also offers a compressive fit that moves with you for all-day comfort. On the thighs and rear of the tights there are panels of Nano Flex Xtra Dry fabric to provide a bit more wind protection and warmth, as well as protection from any road spray. Its not only about the fabrics. Anatomical patterning gives a bend at the knee and the hip, while seamless bib straps lie flat and hold the tights and seat pad perfectly in place so you can concentrate on your efforts. Multiple reflective panels keep you visible and YKK Camlock zippers at the ankles make for easy on and lock and a secure closure. The Bibtight uses Castellis Progetto X2 seat pad. This pad features two isolated layers that work in tandem with your body and saddle to eliminate friction while still offering substantial cushioning whereitsneeded most. Key Features Rain or Shine engineering Nano Flex 3G fabric for the ideal mix of warmth, stretchy compression, softness, and water repellency Nano Flex Xtra Dry fabric panel on upper front and thighs for extra warmth, and on the back to protect from road spray Anatomic cut to hips and knees Reflective inserts for visibility from behind Lie-flat elastic bib straps YKK Camlock zippers at ankles Progetto X2 Air seamless seat pad for long hours in the saddle 0 12C / 32 54F Weight: 302g (Large)
Designed to keep you dry in cool weather. The Prosecco Tech Long Sleeve base layer features a body mapping construction to provide the best wicking and correct levels of insulation right where you need it. The main body is made from a rib knit fabric with Prosecco hydrophilic treatment. The ribbing helps trap air against your skin for optimum temperature regulation, while the hydrophilic treatment helps whip water away keeping you dry even when the efforts intensify. For even insulation across your upper body the Prosecco Tech uses PrimaLoft panels at the waist and back. This thinner material means you dont overheat where you have multiple layers from your bibtights and jersey. A crew neck fits neatly under short-collared jerseys. Key Features 100% polyester proprietary stretch rib knit fabric for main body Prosecco hydrophilic treatment for maximum wicking PrimaLoft panels at waist and back where bibtight covers upper body for even insulation Crew neck closure to fit under short-collared jerseys 6 16C / 43 61F Weight: 151g (Large)
Keeping feet warm is a great way to ensure comfortable winter riding. The Entrata Shoecover is designed to offer a functional and simple solution to cold toes. The Entrata is made from a 4-way stretch fabric with a durable water repellent treatment and a fleece lining. The stretch means the Entrata hugs you shoe nicely eliminating any space for cold air to circulate. The fleece lining provides insulation and water repellent treatment provides splash protection keeping your feet drier for longer. A moulded central panel allows for easy ankle flexing while pedalling and a neoprene cuff gives a snug fit around the ankle. Key Features Warmth and protection for cold weather riding 4 way stretch fabric with durable water repellent finish and fleece backer Molded central stretch panel allows for easy flexing at the ankle Neoprene cuff for optimal fit 4 14C / 39 57F Weight: 117g (Pair)
Warm, stretchy, and water-repellent. The Tutto Nano RoS Womens Jersey is the ideal mix for a spring and autumn jersey. Castelli make the Tutto Nano from the same Nano Flex 3G fabric it uses for its warmers and Sorpasso tights. The high-stretch fabric creates a close-to-body fit that moves with you and does no flap, which in turn helps keep you warm. The fabric has Castellis proprietary nanotechnology water-repellent treatments. On dry days you wont notice it, but when the rain comes you will stay drier than in a normal thermal jersey and be able to get by for longer without having to reach for a jacket. When it comes to breathability, the Tutto Nano strikes a perfect midpoint between thermal jerseys and the water-repellent GORE-TEX jackets in Castellis RoS line-up. The Tutto Nano fabric is a tighter knit than the fabric used in thermal jerseys so it lets less air through keeping you warmer, but it is also more ventilating than GORE-TEX so you dont overheat when the temperature does begin to rise. Castellis attention to detail extends throughout. There is 360 reflectivity thanks to panels on the shoulders and lower back, a YKK zipper with a rubberised pull, and an elastic silicone gripper at the waist holds jersey in place. Key Features Nano Flex 3G fabric features warm brushed fleece inside with 20% elastane for stretch and Castellis Nano Flex water-repellent finish 3 rear pockets Reflective fabric inserts at shoulder and central pocket YKK Vislon zipper Embossed logo 12 18C / 54 64F Weight: 301g (Small)
This jacket does three things really well: the Tempesta Stretch fabric provides full waterproof protection, the four-way stretch makes it fit any body type, and it looks great on and off the bike. Compared with our more expensive GORE-TEX® Idro jackets, you give up the best-in-class breathability and extreme packability, but you gain stretch fit and increased durability. We developed the fabric to our own specifications to make a jacket that is fully waterproof, comfortably stretchy, packable enough to fit in a jersey pocket, and with an appearance and hand that make it look great. This is meant to be a rain shell worn over a jersey, so we've forgone the external pockets and kept the construction simple to minimize seams. We've given it a vent on the back to prevent overheating, a covered zip to keep spray out and reflectivity for safety. What it is: This elegant jacket provides full waterproof protection with a stretch fit for comfort and aerodynamic performance. The jacket is protective enough to wear all day yet looks good on a gravel ride or when you're meeting your mates at the café. Features: Tempesta Stretch fabric with windproof PU membrane provides 10,000 mm waterproofness with 20,600 g/m2/24h breathability Taped shoulder seams for waterproofing Stretchy for extremely comfortable fit that moves with you Packable enough to fit in jersey pocket Covered easy-sliding YKK® Vislon® zipper Extra-long tail for protection from wheel spray Vent on back Reflective stripe at lower back 5°-14 °C / 41°-57°F Weight:204 g
This jacket does three things really well: the Tempesta Stretch fabric provides full waterproof protection, the four-way stretch makes it fit any body type, and it looks great on and off the bike. Compared with our more expensive GORE-TEX® Idro jackets, you give up the best-in-class breathability and extreme packability, but you gain stretch fit and increased durability. We developed the fabric to our own specifications to make a jacket that is fully waterproof, comfortably stretchy, packable enough to fit in a jersey pocket, and with an appearance and hand that make it look great. This is meant to be a rain shell worn over a jersey, so we've forgone the external pockets and kept the construction simple to minimize seams. We've given it a vent on the back to prevent overheating, a covered zip to keep spray out and reflectivity for safety. What it is: This elegant jacket provides full waterproof protection with a stretch fit for comfort and aerodynamic performance. The jacket is protective enough to wear all day yet looks good on a gravel ride or when you're meeting your mates at the café. Features: Tempesta Stretch fabric with windproof PU membrane provides 10,000 mm waterproofness with 20,600 g/m2/24h breathability Taped shoulder seams for waterproofing Stretchy for extremely comfortable fit that moves with you Packable enough to fit in jersey pocket Covered easy-sliding YKK® Vislon® zipper Extra-long tail for protection from wheel spray Vent on back Reflective stripe at lower back 5°-14 °C / 41°-57°F Weight:204 g
This jacket does three things really well: the Tempesta Stretch fabric provides full waterproof protection, the four-way stretch makes it fit any body type, and it looks great on and off the bike. Compared with our more expensive GORE-TEX® Idro jackets, you give up the best-in-class breathability and extreme packability, but you gain stretch fit and increased durability. We developed the fabric to our own specifications to make a jacket that is fully waterproof, comfortably stretchy, packable enough to fit in a jersey pocket, and with an appearance and hand that make it look great. This is meant to be a rain shell worn over a jersey, so we've forgone the external pockets and kept the construction simple to minimize seams. We've given it a vent on the back to prevent overheating, a covered zip to keep spray out and reflectivity for safety. What it is: This elegant jacket provides full waterproof protection with a stretch fit for comfort and aerodynamic performance. The jacket is protective enough to wear all day yet looks good on a gravel ride or when you're meeting your mates at the café. Features: Tempesta Stretch fabric with windproof PU membrane provides 10,000 mm waterproofness with 20,600 g/m2/24h breathability Taped shoulder seams for waterproofing Stretchy for extremely comfortable fit that moves with you Packable enough to fit in jersey pocket Covered easy-sliding YKK® Vislon® zipper Extra-long tail for protection from wheel spray Vent on back Reflective stripe at lower back 5°-14 °C / 41°-57°F Weight:204 g
The Castelli Dinamica Womens Shoe Covers will keep your feet toasty even on the coldest of winter days at once fully windproof, highly breathable and offering high-grade water protection these are a must-have piece of kit if you run cold or face frosty starts. All-new and updated Gore-Tex Infinium X-Fast fabric offers unrivalled, high-grade water protection, keeping you dry when you encounter those inevitable rainy showers, and crucially gives you full windproof protection. Despite its protective properties, Gore-Tex Infinium is also breathable meaning that your feet remain at an optimal temperature, even when the surrounding temperature fluctuates. The fleece-backing of the Gore-Tex Infinium X-fast fabric has an optimal loft, trapping air just above your skin whilst aiding with moisture management. The YKK AquaGuard zipper is primed to protect you from wheel spray whilst the overall height gives even more foul-weather protection the silicone grip at the top of the cuff helps to seal water out and is ideal when overlaid with your tights ankle cuffs. Key Features Cold-weather shoe cover Gore-Tex Infinium X-Fast fabric is breathable, windproof and water-resistant Inner fleece lining for extra warmth Reflective details for low-light visibility YKK AquaGuard Zipper Highly durable heel cap Silicone gripper for sealing water out from the upper edge Suited for 0C to 14C
Endurance-level comfort built around the Progetto X2, Castellis top seat pad. The Castelli Endurance 3 Bib Shorts are a traditional short that will prove a firm favourite with anyone looking to ride far and in comfort. The Progetto X2 Air Seamless seat pad consists of two separate layers: a soft stretchy layer that sits next to your skin and prevents any rubbing, and a perforated cushioning layer with two separate density foams along with breathable perforated gel inserts. These layers work together to keep comfort levels at an all-time high, for the pro peloton and dedicated weekend rider alike. A pro-level seat pad demands a great fit, and thats exactly what the Endurance 3 has. The anatomic cut and mesh bib straps hold the seat pad in just the right place and seams around the hip area create the perfect on-bike shape. The Endurance Evolution fabric provides optimum muscle support and feels dry when youre riding in the heat of summer or even working up a sweat on the turbo. Key Features Endurance Evolution fabric Anatomic cut for perfect on-bike fit Mesh bib straps and back Progetto X2 Air Seamless seat pad Giro3 leg grippers 15 38C / 59 100F Weight: 186g (Large)
The Premio Bibshort has been engineered to provide the ultimate in long-distance comfort and to be your favourite bibshort ever. That’s a big claim, but there’s a lot of development in this short to back it up. We’ve carried the less-is-more theme into the design, with minimalist laser-etched logos and subtle finishing. It looks as premium as it feels. The first thing you might notice is what’s missing: the seams and multiple panels. We engineered a new fabric that changes depending on the needs over various parts of the body. The lower leg has a raw-cut leg ending and rubberized yarns to guarantee a flat grip to keep the leg in place. The fabric becomes lighter in the thigh, while the four-way stretch provides just the right amount of muscle support. With this magical fabric, we don’t need to stitch separate panels together, which ensures more comfort and a better fit, as well as a sleek, sophisticated look. The premium fabrics extend the bib straps. The perforated back keeps you cool and the edge is bonded so you don’t feel the thickness of a stitched edge. The elastic straps have just enough modulus (return) to hold your shorts securely in place without cutting into your shoulders. The seat pad is our top-of-the-line Progetto X² Air Seamless pad. It’s actually two separate components: a soft, stretchy Skin Care Layer next to your skin, which has the sole purpose of preventing any rubbing on your skin, and, under that, the Cushioning Layer, which features two separate densities of foam along with breathable perforated gel inserts under the ischiatic bones and perineum. In the pelvis area, the compression and support increase to keep the seat pad and everything else in place, and the fabric gets thicker to avoid any embarrassing transparency issues. Features: The premium all-conditions short Gradient stretch woven fabric for the right support in the right place Woven fabric weighs 30% less than comparable knit fabric Perforated back bib panel with lie flat bib straps that don’t bind at shoulders Integrated gripper elastic at leg ending holds short in place without need for extra silicone grippers Laser-etched logos with RossoCorsa at center back and black scorpion shadow logos at lower legs Progetto X² Air Seamless seat pad
The Premio Bibshort has been engineered to provide the ultimate in long-distance comfort and to be your favourite bibshort ever. That’s a big claim, but there’s a lot of development in this short to back it up. We’ve carried the less-is-more theme into the design, with minimalist laser-etched logos and subtle finishing. It looks as premium as it feels. The first thing you might notice is what’s missing: the seams and multiple panels. We engineered a new fabric that changes depending on the needs over various parts of the body. The lower leg has a raw-cut leg ending and rubberized yarns to guarantee a flat grip to keep the leg in place. The fabric becomes lighter in the thigh, while the four-way stretch provides just the right amount of muscle support. With this magical fabric, we don’t need to stitch separate panels together, which ensures more comfort and a better fit, as well as a sleek, sophisticated look. The premium fabrics extend the bib straps. The perforated back keeps you cool and the edge is bonded so you don’t feel the thickness of a stitched edge. The elastic straps have just enough modulus (return) to hold your shorts securely in place without cutting into your shoulders. The seat pad is our top-of-the-line Progetto X² Air Seamless pad. It’s actually two separate components: a soft, stretchy Skin Care Layer next to your skin, which has the sole purpose of preventing any rubbing on your skin, and, under that, the Cushioning Layer, which features two separate densities of foam along with breathable perforated gel inserts under the ischiatic bones and perineum. In the pelvis area, the compression and support increase to keep the seat pad and everything else in place, and the fabric gets thicker to avoid any embarrassing transparency issues. Features: The premium all-conditions short Gradient stretch woven fabric for the right support in the right place Woven fabric weighs 30% less than comparable knit fabric Perforated back bib panel with lie flat bib straps that don’t bind at shoulders Integrated gripper elastic at leg ending holds short in place without need for extra silicone grippers Laser-etched logos with RossoCorsa at center back and black scorpion shadow logos at lower legs Progetto X² Air Seamless seat pad
The Transition 2 Jacket is a mid-weight jacket perfect for those autumn and spring rides where you want to cut the chill but dont want to overheat. The front and sleeves of the Transition 2 is made from the same windproof fabric as Castellis pro-level Gabba but with a fleece backing for greater warm. The back of the jacket forgoes the wind stopping membrane for greater breathability, letting sweat and excessive heat easily escape. All the details are there, from 3 rear pockets that are perfectly sized and placed, a silicone gripper at the waist holds the jersey in place, to a YKK Vislon zipper makes for easy opening and closing. The fit of the jacket is neutral. Neither restrictive like a race cut or loose like a more casual cut. Along with the reflective detailing, this makes the Transition exceptionally useful and wearable on all manner of rides. Key Features GORE-TEX INFINIUM WINDSTOPPER X-Mid front and sleeves for wind protection with exceptional breathability Warmer fleece fabric on back for additional breathability YKK Vislon zipper 3 rear pockets Embossed logo on chest with reflective stripes for visibility Reflective panel below pockets for further visibility 8 16C / 46 61F Weight: 334g (Large)
Designed to keep you dry in cool conditions, the Prosecco Tech Short Sleeve base layer has a body mapping construction to provide the best wicking and corrects levels of insulation right where you need it. The main body is made from a rib knit fabric with Prosecco hydrophilic treatment. The ribbing helps trap air against your skin for optimum temperature regulation, while the hydrophilic treatment helps whip water away keeping you dry even when the efforts intensify. For even insulation across your upper body the Prosecco Tech uses PrimaLoft panels at the waist and back. This thinner material means you dont overheat where you have multiple layers from your bibshorts and jersey. A crew neck fits neatly under short-collared jerseys. Key Features 100% polyester proprietary stretch rib knit fabric for main body Prosecco hydrophilic treatment for maximum wicking PrimaLoft panels at waist and back where bibshort covers upper body for even insulation Crew neck closure to fit under short-collared jerseys 10 20C / 50 68F Weight: 114g (Large)
Combining the luxurious quality, wicking, and naturally odourless qualities of merino wool with the superb insulation of PrimaLoft yarns, the Castelli Alpha 18 Socks are ideal for your coldest adventures and when going out on the bike feels like a necessity more than anything else. Nylon heels and toes introduce durability and arch support bands hold the socks in place. Key Features PrimaLoft/merino wool blend Arch support band Nylon heel and toe 18cm ankle height