Safe & Reusable This upper arm shower cover is Waterproof TPU material. Moisture protection And the inner sleeve of Comfortable and breathable fabric which is durable, washable, latex-free and non-slippery. Safe for useCan use for people who is recovering from injuries, surgeries and skin problems. Using tips Put on the lining and putting sleeve on, bent your arm and lift edge with finger, then press on sleeve to get air out. And It will form a tight seal which does not allow water in. Applicable UserSuitable for most people weighing 45-64kg; upper arm circumference: 19-23cm; lower arm circumference: 16-19cm. Easing WearingUpper arm shower cover high elastic opening makes it easily pull in a non-painful way. will not stick on arm when shower. It can always keep the inner plaster casts or wound dressings dry and arm circulation normal. Put on the liner and cover, bend your arms, lift the edge with your fingers, and press the sleeve to vent the air. It creates a tight seal that does not allow water to enter.