Complying with FIA regulations, Alpinestars' Nomex underwear keep drivers safe and comfortable in their world title pursuits. Alpinestars Nomex long under pants are both soft and lightweight. FIA Homologated 8856-2000 80gr 95 percent Meta, 5 percent Para Aramid Fiber Fabric (Kevlar®). Kevlar® included for softer feel and precise fit. Flat seam construction to avoid pressure at sew lines.