3D anaformable tech mesh upper quarter package. Hydrophobic Tru-Suede synthetic leather lining material. Exterior 3D injected heel cup for support. Lightweight insta-form+foam ankle pads.Anatomical molded tongue with high density metatarsal guard. Grip power channel construction footbed. Tuuk Lightspeed 2 with solid stainless steel runner. Sizes 2 thur 5.5 with 1/2 sizes D width