Sound quality is very good, no distortion, very loud at the same input level, I find myself running these at least 3 clicks down on volume vs my other headphones on an iPhone. All of their products while expensive are very well worth the price. It is thinner than most mats made of this same material but that makes it lighter and easier to manipulate and clean. The fit is snug and the rubber latch part is fairly secure and not super thin. around the house and there it was not too be missed. The lid is a little tough to open but hey at least I know my buds will be secure. size of what you order but the slide shows a size down which maybe the size in UK (just guessing) I hope so cause I ordered a size 9 and the box says 9 but the slide says 8 and it fits good cause im normally a size 8 US in men but ordered up to a 9. As seen in the pics, there?s also a white dot on the left and I can?t figure out what that?s supposed to be. Great for slips ons around the yard, or use the heel straps for more extended walkin/hiking. Chinese knockoff of OEM.