3D Anaformable tech nylon upper quarter package. Quick dry synthetic liner, exterior 3D injected heel cups for support. Insta-form+foam ankle pads, anatomical 48 oz. 2-piece felt with high density metatarsal guard tongue construction. Power channel superfit+ footbed. Tuuk Lightspeed 2 with Tuuk Super stainless steel runner. Sizes 1thur 5. D width