The boot's compact design has been designed to fit effortlessly under any pants

ribbed knit collar and flat seams on the shoulders

guaranteeing premium comfort and protection

a breathable 3D‑mesh inner bootie

zx bottom evo v3 fia sfi white YGroup_3306523 The boot's compact design hasAlpinestars ZX EVO V3 Bottom is constructed with LENZING FR, an innovative, sustainably produced viscose fiber that provides exceptional flame resistance and protection against heat transfer. This Formula 1 specification underwear is extremely lightweight and thin, and designed to be incredibly soft to the touch, offering greatly enhanced comfort when wearing a driving suit.