The bottom are anti-slip. It just works and thats good enough for me. Great looking, Rugged, Quite comfortable and nice price. Im a 7 1/2 (I bought the the size 8) and they are a little long on my foot which what I expected. I could not believe how much more soundstage was lifted, singers voices and each instrument had more clarity and nuance. Nach 6 Monaten hat die weichere Plastik angefangen, sich von den festeren Teilen zu lösen. Thanks a lot for this and cant wait to get my second one! Bought this as a replacement for my son’s EKSA E900 USB Gaming Headset-Xbox One Headset which he managed to misplace as the mic obviously detaches from the gaming headset. It also holds my martini glasses, champagne flutes, and snifters perfectly well. 5 would have been ideal in my case, and size 7 although fractionally too long seems to be an otherwise good fit all round.