Vibram FiveFingers Seeya Women's Running Shoes Rubber Minimum Rubber Outsole - Maximising the "foot Feel" and flexibility. Soft TPU Midsole - Reducing the thickness and weight, while enhancing natural movement and barefoot sensation. Stretch Mesh - Featured on the upper with a seamless collar and a hook-and-loop fastening systems, providing a snug fit. Stitched-in Insole - Protects the feet against irritations on long runs. Upper - Polyester Stretch Mesh