Size: W36 (22.5 cm), W37 (23.2 cm), W38 (23.8 cm), W39 (24.4 cm), W40 (25.0 cm), W41 (25.7 cm), Material: Upper Material: Shiny Polyester with Hook and Loop Adjustment, Sole Material: XS Trek Compound Spring, Walking, Gym, Fitness, Exercise, Indoor Room Shoes