The silicone seal and the plastic ring is moulded by the machine, we also add the elastic meme, make sure no gap inside. More durable and the rubber seal will not break off. Can be used repeatedly throughout the recovery. It is highly recommended by orthopedist.Important Using Notice:the top around the blue rim naturally collects a little bit of water when shower, so please either drain off by tipping the top a bit or use a towel to towel try before slipping off over your cast or bandage. Aftering showering, you may feel damp on your bandage or cast, this is the water fog due to the temperature difference, not the water seeps in.Ideal choice for people who has the leg cast, brace or knee immobilizer. Made of elastic rubber and heavyduty vinly. The soft and elastic silicone opening uses skin sensation technology, Which can reduce the friction. You can feel smooth and comfortable when taking on. Help you stretch easily over the cast and brace.Latex free material, feel safe to use. This full leg shower boot cover fit adult thigh circumference between 14.9' to 24.4inch (37-61 cm). Roomy and baggy design for free movement. PLEASE NOTICE: please measure your leg's cast circumference. The diameter of the blue plastic ring is 9.85"(25 cm). Length: 43.5 inch long which can cover the full leg brace.Leg shower bag cover. Recommend for showering, bathing, and some outdoor activities when recovering from injuries, surgeries, accidents or when suffering from medical conditions. Please control the shower time within 15 minutes.