EXPANDABLE RUBBER DIAPHRAGM ACCOMMODATES DIFFERENT DIA’S OF ARMS, MAKES WATER TIGHT SEAL,ALLOWS EASY PULL ON APPLICATION.RIGID RING OFFERS EASY TO WEAR,SELF SEALING MECHANISM. TRANSPARENT FLEXIBLE BODY IS NON POROUS, NON STICKY & LIGHT WEIGHT. ANATOMIC SHAPE ENSURES THAT THE HAND REMAINS FUNCTIONAL.