The reason I am not returning it is because it works on bathroom tiles and doors. JBL stays composed all the way to the max, maybe keep UE one notch above the very max on the bass-heavy songs. These run one size smaller than your actual size, I wear size 11 and ordered a size 12 and they fit perfect , they are so comfortable words cant explain. Fits just perfect. Unfortunately, day before yesterday the zipper came off in a section and I had to struggle to get my headphones out. The last thing that you want, is for a sudden shower to fall, only to find holes in your emergency raingear. The speed with which you can set up and adjust your grip just cant be beat by any other type of strap. One thing I really like is you can flip the trim part of the slipper up to make it more off a boot and keeps my ankles warm. These are my favorite sandals/flip-flops ever. My only comment is that the size is a tad smaller than expected.