YUNCHI Waterproof Leg Cast Cover for Shower Extra Wide NonSlip for Adults Plaster After Operation Over Boots Large Dressings BandagesProtectors Durable Reusable New Updated (XL Lower Leg). UPGRADED SUPER LIGHTWEIGHT & PATENT DESIGN: YUNCHI extra large waterproof shower boot cover upgraded to a super lightweight, thin ring( 1.45cm) and with an anti-accumulation water patent design to effectively prevents water from seeping in and creates an impenetrable watertight seal just below the knee to keep your foot dry.