Sublimated silver nylon quarter package with thermoformed ribs. Hydrophobic microfiber lining material. Patented integrateged, anatomical heel/ankle support. Insta-form+ foam ankle pads. Anatomical, 2-piece felt form fit tongue construction. Anatomical ETF Superfit+ footbed. Lightweight Pro-8 beveled TPR outsole. Tuuk Custom+ blade holder with solid stainless steel runner.