Wonderful product!
I purchased 2 DRYPRO Waterproof Cast Protectors. Medium Full Leg FL-16. I wear heavy duty knee braces after Bilateral injuries/surgery. My orthopedic Dr said I can do anything in the pool if I keep my braces on. I wrap my knee braces lightly with ACE wrap for padding prior to pulling on the Waterproof Protector as my braces have possible sharp edges. The bulb syringe for evacuating the air is great. At first I had slight leak, due to user error. (I didn't pull them up past my brace enough, and any air left in will try and exit the top cuff. )
I have now used them 8-10 times for swimming as well as a water aerobics class without issue. I try to be as gentle as possible, however they have surprised me as fairly sturdy.
I would recommend these to anyone that needs waterproof protection for rehab/recreation. This product has allowed me a bit of freedom I would not have had without them. Worth every penny!!