1. WITHSTANDING WATER AND MOISTURE: Our waterproof cast cover base membrane gasket is made of medical grade silicone. 2. CERTIFICATION:. Without odor and latex-free. Ideal for at home or in the hospital. 3. FITS THE ADULT FOOT: The waterproof cast bag fits most adult foot sizes. Length up to 11 inches, leg circumference from 2 to 7 inches. 4.SAFETY AND EASY TO USE: The elastic rubber flange does not interrupt blood circulation. No tape or straps required. Easy to put on and take off. 5. Stretchable Opening Makes Donning Easier: The central hole is stretchable and fits leg diameters from 2 to 7.3 inches Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.