PROLOGO ZeroTri Pas Tirox SaddleTirox: Rail light-alloy steel, highly resistant to traction, and torsion, for its physical characteristics and light weight, is used in the aviation and aerospace industry.T-Irox then turns out to be a rail with a good balance between weight and strength, that doesn’ t fear the normal stress that addresses a bicycle.PAS System: The PAS system is a processing of the base of the saddle, the hole or channel has been designed to eliminate pressure to a zone of support delicate as the pelvic area. Prevents pressure peaks in the prostate area, ensuring optimum comfort. This is a system studied, designed and recommended to eliminate pressure and numbness in the pelvic area-prostate.Carbon Fibre Injection: The percentage of carbon fibre into the compound can vary model by model and it can go from 14% up to 18%. The Carbon Fibre injection gives strength to the base increasing its stiffness and duration.SHAPE: Flat END USE: Triathlon Learn more, with the Prologo Buying Guide.Features: Size: 254 x 136mm Weight: 250g Base: Carbon fibre injection Rail: TiroX Cover: Microfiber Padding: Light PUBuy PROLOGO Components from Chain Reaction Cycles, the World's Largest Online Bike Store.