Main upper chassis constructed from supple, lightweight kangaroo leather for exceptional levels of comfort and durability. Lightweight micro-porus padding around the heel and insole enhance comfort while driving. All graphic elements are printed for improved weight saving. Extensive perforation zones on lateral and medial sides, tongue and collar improved ventilation. Alpinestars new closure design features an extensive hook and loop grip strap and elasticated gusset. This hook and loop grip strap closure offers a secure, comfortable fit. Lightweight rubber compound sole with textured grip improves pedal feel in race condition.