Quarter Package: Sublimated silver nylon with thermoformed X-rib pattern Lining Material: Hydrophobic microfiber Ankle Support: Patented integrated, anatomical heel/ankle support Ankle Padding: Insta-form+ foam ankle pads Tongue Construction: Anatomical, 2-piece felt form-fit Footbed: Anatomical ETF Superfit+ Outsole: Pro-8 beveled, Dual-Density Composite Blade Holder and Runner Tuuk Lightspeed 2 with solid stainless steel runner