Easy to put on and take off: no clasp, soft and comfortable material makes this waterproof arm plaster cover easy to put on and take off in an painless way to maintain blood circulation. Soft and comfortable waterproof sealing: the waterproof sealing material is neoprene composite elastic fabric, which has better elasticity and softness. The pressure at the seal is small, making it more soft and comfortable. Latex free and reusable: PICC series shower covers are 100% latex free, non irritating to skin, and reusable. Safe use: most suitable for chemotherapy shower and bath. Especially those suffering from cuts, rashes, burns, skin problems, wounds and scratches. This size is suitable for adults. S-shaped upper arm circumference: 6.3 "to 14.9" (16cm to 38cm)