[Stretchable Entrance]: Stretchable hole is make sure it fits most adult and older kids. [up entrance suitable arm size range: circumference from 9.5" - 15.7", diameter from 3" - 5"] [down export suitable arm size range:circumference from 6.2" - 12.5", diameter from 2" - 4"]. [Reusable]: PICC protector is easy to put on & off, the strong material makes it reusable for a long time, After each shower, only need to wipe outside than hang it to dry. [100% Waterproof]: The hole of the arm cast cover bag uses the same high-elastic neoprene as the diving suit, which is completely waterproof, keeping your elbows dry and comfortable during showering and bathing. [Wide Range of Uses]: JuoPool PICC line sleeve can keep IV and PICC, plasters, bandages, and wound dry, provide all the protection to keep water away, suitable for the arms of most adults. [Advanced Materials]: This PICC Line shower cover are made of ECO-Friendly Medical Grade materials TPU, which is LATEX FREE and better than PVC Shower cover bag in all aspects.