1. Easy to Put on and Off: No retaining ring, soft and snug material allows this waterproof arm cast cover to be easily pulled on and off without discomfort, helping maintain blood circulation. Adult size fits upper arm circumference between 12" to 20" (30.5cm to 51cm). 2. Soft and Comfortable Watertight Seal: The watertight seal is made of neoprene composite elastic fabric with enhanced elasticity and a softer feel, applying minimal pressure at the seal for improved comfort. 3. High-Quality & Stretchable: The seal is constructed from medical-grade silicone material and stretches easily to accommodate most arm sizes for men and women. Suitable for use during showering, bathing, or outdoor activities while recovering from injuries, surgeries, or medical conditions such as cuts, rashes, burns, skin issues, wounds, and scratches. 4. Comfortable & Easy to Use: Features no bulky plastic diaphragm, minimizing restriction to blood flow. The self-sealing, highly elastic opening allows for easy and pain-free application and removal. Fits both slender and larger arms without risk of tearing. 5. Improved Design Compared to Previous Versions: Unlike other arm protectors, this shower cover helps avoid aggravating injuries during application or removal. Designed for ease of use with no bulky seals, it does not restrict circulation and requires no additional tapes or fasteners.