Waterproof Protection Designed: This kids and youth arm cast cover protector is fully sealed using a unique flexible rubber that creates a vacuum and a securing plastic ring. It protects the bandage, wound, or injured area from moisture and water, keeping casts and bandages dry during bathing, showering, or other outdoor activities. Safe and Durable Medical Grade Material: The cast cover bag is made of reusable, durable, and thick material, including high-quality PVC, polypropylene, and rubber that won't rip or tear. The reusable PE cover ensures long-lasting use. Kids Arm Cast Protector: This 20-inch watertight arm cover extends above the elbow and is long enough to cover elbow and lower arm injuries. The wide opening allows most kids and youth to easily slide their arm in or out. It fits upper arm circumferences between 6.2 inches and 14.5 inches, providing a secure fit to keep the arm or bandage dry during showering. Note: Please measure the maximum arm circumference before ordering, especially when wearing a cast or bandage. Easy to Use: This kids' arm cast cover protects the arm, hand, wrist, thumb, fingers, elbow, or other injured areas. It allows for showering, bathing, or participating in outdoor activities during recovery from injuries, surgeries, accidents, or medical conditions such as rashes, burns, skin issues, wounds, and scratches.