NWT S = size 13-1 M = size 2-3 L = size 4-5 Base has quality memory foam placed in the heels and arch Backless sandals are easy to slip on and the elevated heel helps to secure them Sizing: Kids Care and Cleaning: Air dry, Brush away surface dirt, Wipe with damp cloth Lining Material: Polyester Insole Material: Polyester Upper Shoe Material: 100% Polyurethane Sole Material: 100% EVA Footwear outsole details: Non marking outsole, indoor/outdoor outsole Shoe Width: Medium