Upgrade Silicone Seal Ring: The seal of the knee cast cover is made of premium silicone material with high elasticity, ensuring it won't tear. The seal ring is soft and stretches easily to fit most leg sizes and casts. Note: Please measure the leg length and maximum knee circumference before ordering, especially if you have a cast or bandages. Size Fits Most Adults: The knee shower protector is easy to put on and take off without touching the wounded area. Item size: 15.7" x 11" (40 cm x 28 cm). Fits adult leg circumferences from 11.8" to 22" (30 cm to 56 cm). Quality Assured: Avoid sharp objects during use. If you have any issues with the waterproof knee cover, please for assistance. Completely Waterproof: Keep your cast or wound dry during showers. This knee surgery shower cover provides a secure, watertight seal around the knee, ideal for adults recovering from knee replacement, injuries, or accidents. Reusable & Durable: Made from high-quality materials for long-term reuse. After each use, simply hang to dry and store conveniently.