The Evolv Men's Rave Climbing Shoe is a leather Climbing shoe for Technical, all-around climbs. Unlined for close to skin Fit and comfort, plus they've ditched the laces so they slip on with ease. A TRAX SAS Outsole offers incredible friction and grip, plus durability for climb after climb. Features of the Evolv Men's Rave Climbing Shoe Unlined leather provides maximum breathability and comfort TraxA(R) SAS provides the best friction plus maximum durability Full-length Midsole and Outsole Variable Thickness Rand (VTR) system puts thinner rand rubber in Areas to reduce pressure points and hot spots around the foot as well as thicker rubber for increased longevity in the High wear zones near the toe for durability and Performance