DURABLE & Reusable: Made of medical grade PVC, durable and not easy to rip or tear, the waterproof arm cover is eco-friendly, reusable and washable; suitable for everyday use, such as therapy, bathing, showering and many outdoor activities ADULT SHORT ARM: length up to 21.5 inches, circumference 6-15 inches (please do not exceed the range after molding) , suitable for most adults or teenagers; If the leakproof cast cover is too long, just bundle the extra space and pump out all the air, according to the shape of the arm FULL SEALING: 100% waterproof design; With a fully sealed, waterproof and tear-resistant sealed diaphragm, the Cast Arm Protectors provide excellent protection for dressing, casting and bandaging while showering or bathing EASY TO USE: The cast cover is designed to easily stretch the cast then the diaphragm self-seals tightly around the arm without tape or straps; Simply slip the waterproof ring over your arm, then pull down slightly to form a protective waterproof seal. Recommend to wear it under the help of others if you are in cast; Please check the measurements provided to ensure full coverage; Do not suggest to use while swimming