ComfortSeal waterproof cast and bandage protectors are the easy way to keep water out during showering, bathing or play. It keeps casts and bandages dry. The easy and durable way to stay dry for showering and bathing. It is easy to apply. Application ring eliminates need for strapping, pumps or hook and loop closure. The diaphragm stretches easily over cast or bandage to form watertight seal. Durable polyvinyl bag prevents water penetration. It is crafted with durable PVC liners and the diaphragm does not contain latex making this reusable. The adult arm or hand cast cover size measures 13" by 8.5" by 6". Kindly remove any sharp jewelry and smooth out all rough edges on your cast to prevent tearing the diaphragm. Using your thumb, stretch the diaphragm to make room to insert your cast. Insert your cast into the 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.