Within Fizik’s Spine Concept system, this saddle is categorised as a "Bull" type which means it’s designed for those with less flexibility in their spines and who’s pelvises rotate a lot when pedalling. Advanced Construction The Aliante R3 boasts corrosion-resistant K:ium rails, which are lightweight and strong and a nylon base that’s reinforced with carbon fibre. This design provides a platform that ensures outstanding pedalling efficiency and durability. Finally, the base is covered with Comfort Core foam and a tough Microtex cover.