Seal-Tight Cast and Bandage Protector is the best watertight protection available. Easy to apply with the patented application ring, eliminates need for strapping, pumps or velcor closure. Non-latex diaphragm stretches easily over cast or bandage to form a watertight seal. Durable polyvinyl bag prevents water penetration. Reusable. With normal care, it will last for 6-8 weeks of daily usage. Use for therapeutic care and daily showering or bathing to protect casts and bandages.