Upgrade Silicone Seal Ring: The seal of knee cast cover is made of premium silicone material that has higher elasticity, and won't tear. The seal ring is soft and stretches easily to fit most size legs and casts.Note: Please measure the leg length and maximum knee circumference before ordering! (e.g.got cast and bandaged).Size Fits Most Adults: The knee shower protector after surgery is easy to put on and take off, won't touch the wounded part. Item size: 15.7"*11"(40cm*28cm). Fits adults leg circumference from 11.8" to 22" (30cm to 56cm).Quality Assured: Avoid sharp objects when using, if you have any problems with our waterproof knee cover for shower, please feel free to , we will reply to you soon.Completely Waterproof: Don't let a cast or wound stop you from enjoying a shower. Our knee surgery shower cover is waterproof and won't seep, provide a secure watertight seal around knee, ideal for adults who are recovering from knee replacement surgeries, injuries, or accidents.Reusable&Durable: make the shower protector for knee reusable for a long time, after each use, just need to hang it to dry, easy to store.