These headphones have worked great. I went through 5 different sizes to figure this out. This is a pricey accessory, but you will not be disappointed with how well it drowns out the world and puts you in the game completely. So so comfortable,. What would have led to the 5-star review:Fits perfectly on my ear and the battery easily lasts throughout an entire workday. These aren?t perfect but they did work. El producto genial pero es demasiado pequeño I was nervous reading some of the reviews but I have NOT experienced any cuts or abrasions assembling these at all and they work and stack like a dream! I got these today its Easter Sunday! Most comfortable, longest lasting slippers Ive ever owned.