Alpinestars Tech 1-Z Driving Shoe - Size 11 - Anthracite/Black/Fluorescent Yellow - FIA/SFI Approved (2715115-1045-11) The Tech 1-Z shoe is certified to FIA and SFI 3.3/5 homologation standards Main upper constructed from superbly supple lightweight kangaroo leather for excellent comfort and durability Lightweight micro-porous padding around the heel and foot bed enhances comfort. All graphic elements are printed for weight-saving and improved performance. Closure system with adjustable Velcro strap for secure and personalized fit.