Waterproof knee pad for shower: the large middle hole fits the knee circumference of 8.9-22.9cm and the small middle hole fits the knee circumference of 39-54cm above above the knee - Simply measure the circumference 8cm above the knee. Length: 38cm. Keep your bandage dry: This waterproof cover uses a reinforced neoprene seal that prevents leaks of water, allowing you to bathe and shower with confidence. Simple and easy to use: our waterproof cover has a flexible seal and is completely self-supporting, allowing you to install and remove the shell with ease. FDA certification and comfortable material:shower protector for adults.Our knee protector seal is made of quality silicone.The knee pad is made of PVC material, which is non-slip and does not stick to your knee. Latex-free, odorless and tasteless, easy to wash off. Protection against viruses: Ideal for chemotherapy, showering, bathing, swimming. Especially for people who recovering from chemotherapy, surgery or skin problems.