Vibram Men's KMD Sport LS, Black/Yellow/Green, 46 Polyester Fabric and Nylon Mesh - Implemented in the upper and footbed, this material allows the shoe to breathe whilst being incredibly comfortable. Seamless 2mm footbed - Stitching free, to reduce friction and improve comfort. Speed Lacing System - To accommodate wider feet and higher insteps. 4mm Vibram TC1 Perfromance Rubber Outsole - Offers excellent grip, traction and protection for a wide variety of activities. Weight: 189 Grams