Designed for Formula 1 racing, the Alpinestars ZX Evo v2 line of fire-retardent underwear is extremely light and thin, without sacrificing comfort or protection. Through the use Alpinestars' proprietary Lenzing FR fabric, the ZX Series uses a revolutionary tubular knit construction, making the Alpinestars ZX Evo Racing Underpants nearly seamless. The comfortable, form fitting design features an elongated rear to help improve fit in the seated position. The naturally breathable Lenzing FR fabric is excellent at wicking moisture from the skin, while being soft to the touch, hypo-allergenic and anti-microbial.