Wear Methods: Kids are advised to wear and remove with the help of other people to prevent the plaster from scratching on the silicone seal and causing tearing; Then extend the injured arm in the arm cast cover protector slowly according to the instructions. One Size Fits Most Kids: This arm waterproof protector can fit all customer requirements due to its soft and flexible nature; Length up to 21 inches/53 cm and the maximum width of the center hole is 6 inches/15 cm; The cast or bandage circumference of your kids broken arm can not exceed 15 inches/38 cm. Arm Cast Protector for Shower: Easy to wear this arm cast waterproof cover and keep your arm cast or bandage away from getting wet when bathing, showering or playing. Comfortable and Reusable: The waterproof cast cover arm was made of PVC and food-grade silicone material, it’ s reusable and skin-friendly; High quality withstand washing but ensure it’ s dry before and after use to avoid irritating the skin. Waterproof Design: Sealed diaphragm at the top of the arm cast cover protector keeps your bandage out of the water, without any strain and pain from the tightening; It also will not slip easily.