Outer material: synthetic Inner material: synthetic Heel shape: no heel Shoe Width: Medium Water resistance: not waterproof. These Hummel ST. Power Play sneakers are designed for adults and feature a black color family and a size 4 UK. The unisex design makes them suitable for everyone. The outer and inner materials are synthetic, offering comfort and durability. The heel shape is not specified, and the shoe width is medium, providing a comfortable fit. These sneakers are not waterproof.