A sock-like collar features a ribbed cuff for a close, secure feel. It’s supportive design is based on the Nike Elite High Quarter Socks. Flyknit throughout the upper integrates breathability, stretch and support. Molded overlays add even more durability. Rubber at the outsole delivers traction for your workout. A detachable Vibram rubber crampon provides enough grip for an outdoor trek, while adding protection at the toe and heel. Straps at the forefoot and midfoot allow for easy on and off.