The materials used were almost purely plastic, the the zipper broke the first time i put them on and despite careful measurement they were half-a-size too big. i eventually fixed the zipper and almost immediately the rubber sole on the toes of BOTH started falling off. everything was plastic, they were poor to adjust and overall the product was of obscenely low qaulity. please do yourself a favor and avoid this product, this seller, and any affiliation to their ridiculously bad quality items.