Sixs - PN2 WB WindShell Carbon Underwear Leggings with Rear PadWindShell Carbon Underwear leggings whit butt patch protect the athlete's entire leg and guarantees comfort on the seat thanks to SIXS Air Shield technology, it creates a breathable windproof barrier on the front part. A micro air cushion that defends the body without causing the classic ""greenhouse effect"" that increases perspiration forms. Groin, thighs and calves remain dry and at the optimum temperature to achieve effective muscular performance.