Worked exactly as described
Bought this to keep a wound dry while showering.  Worked perfectly.  I did make sure it had a tight seal with no kinks and pulled it up as high as it would go on my leg then pulled down so it looked like the picture in the product description.  Also, I squeezed out the extra air.  Used it for almost three weeks with no issues in performance.  Would definitely recommend.
Rating: 5 stars