Vibram FiveFingers Size Chart The KMD EVO defies gravity (and conventional wisdom), allowing athletes extraordinary freedom for dynamic movement both in the air and on the ground. The highly responsive sole combines cushioning and energy return, with a barefoot design for flexibility. XS Trek outsole material provides excellent all-round traction and durability. The KMD EVO transcends traditional sport, making it the ideal climbing, leaping, and balancing shoe for those seeking a minimal shoe experience with maximum flight potential. Features: - Insole: 2 mm EVA+Anti Microbial Drilex Sockliner - Midsole: 6mm EVA - XS Trek Rubber Sole: 3mm - Upper Material: 100% Low Elastic Polyester Filament - Vegan - Weight: Women's size 38 = 5.64 oz