OMG. I loved this. I got it last summer when I had emergency knee surgery a week before my planned vacation. Bad situation. HOWEVER... I was able to GET IN THE WATER instead of frying and crying. You DO have to read the instructions and get the correct size. It fits very snug and keeps the water out. I am so happy I found this, because my doctor did not tell me about it and advised me to stay home and wallow instead. Hooray for products such as these.