Easy to use: Using your thumb, stretch the diaphragm to make room to insert your cast. Insert your cast into cast cover. Once completely over your cast, push the plastic ring toward the cast so the inner edge of the diaphragm points up and away from the cast. Reusable: This shower cover's durable materials will last the life of the cast or bandage, eliminating the need for costly cast replacement. Skin friendly: The dressing cover is latex-free. It is designed with a polyvinyl bag and non-latex diaphragm ring preventing an allergic skin reaction. Waterproof: This cast protector creates a snug fit around the cast to maintain a waterproof seal. Protection: These easy-to-use wound cast covers keep water from entering the wound area, restoring your freedom to shower independently and maintain personal health.