Alpinestars (275112-152-11 Gray/Yellow Fluorescent/White Size-11 Tech 1-Z Shoes The extremely lightweight Tech 1-Z is made from premium kangaroo leather and features a streamlined cut Exclusive Kevlar speed lacing system, derived from Alpinestars MotoGP technology ensures quick, precise and secure closure Single, large Velcro ankle strap for better shoe stability Thin tongue flap enhances comfort and helps provide a snug fit Complies with the following homologation standards FIA 8856-2000, SFI 3.3