Features 1、Suitable for protecting adult's knee use. 2、Environmental friendly material, no stimulation, harmless and reusable. 3、Suitable for keeping water out when taking shower, bathing or walking in the rainy day. 4、Tightly sealed and waterproof design will keep the cast/bandage dry. 5、A comfortable w​​​aterproof protector which slips over a cast or bandage. Specification Features: A comfortable waterproof protector which slips over a cast or bandage. Tightly sealed and waterproof design will keep the cast/bandage dry. Suitable for keeping water out when taking shower, bathing or walking in the rainy day. Environmental friendly material, no stimulation, harmless and reusable. Suitable for protecting adult's knee use. Specification: Item Type: Knee Cast Material: PP + Silicone + PVC Length: Approx.42cm / 16.5in Outer Diameter: Appprox.200mm / 7.8in Inner Diameter: Approx.150mm / 5.9in Package Weight: Approx.219g Package List: 1 x Knee Cast Cover Note: Please allow 1-3cm error due to manual measurement. Thanks for your understanding. The product will have an odor after being opened, and the odor will dissipate after being soaked for a while.