It is the strong and complex bonds that strengthen the structures, even in the tissues. Ergonomic in Thunderbike fabric, i.e. 80% polyamide and 20% elastane. The Thunderbike fabric is a rubbery polymer and more precisely a fabric composed of high density bonds that reinforce its structure. Laser cut with internal silicone at the bottom of the leg. With perforated and two-tone straps, AIRGAP® chamois leather, recycled yarns.