Designed to provide the best protection against rain. WaterFlex material, featuring an outer layer of polyurethane (PU) rubber and inner microfleece. Water-resistant, flexible, and durable. The 38 mm wide Velcro strap allows for the use of these overboots for (inline) skates. All seams are covered on the inside with waterproof tape. Two reinforced areas between the sole and the zipper, as well as at the front. Industrial-strength YKK zipper.