Mala calidad, se me despegaron las 2 suelas con muy poco tiempo de uso. I recommend these highly. I bought it for my boo but he likes them. -Comfort level for me was passable after wearing it for a few hours I had no real levels of discomfort. I love these shoes and the shade of blue is perfect, hard to tell in pic, but not too blue, just perfect! Poor adhesive quality, I received this less than a month ago. Feels silky, but not see through at all. The fit the rear area but you have to modify the forward bar to reach the rails. I was looking for some cheap racks to create some more room in my kitchen inside of a closed cabinet. She tells me the sound is excellent, and that they block out all the background noise.