Designed to offer the best protection against the rain.Key Features:WaterFlex material, outer polyurethane (PU) rubber with inner,MicroFleece. Water-resistant, flexible and durable,38mm wide Velcro strap allows you to use these shoe covers for (inline) skates,All seams are covered inside with waterproof tape,Two reinforced parts between sole and zipper as well as on the nose,Industrial strength YKK zipper,50% polyester, 50% polyurethane.