The new ones have an adhesive backing but you just about have to break or at the least damage your headset to get the old ones off. The bottom part of the shoe is substantial and cushiony, I feel like it has good arch support and my feet feel cushioned as I walk. Removal, trimming, and re-installation took a total of about 30 minutes. When they connected, my apple music jammed. So far it?s been great nice and bright. Even the plastic volume control/microphone button is shoddy and poorly made. I read a ton of reviews, watched every single video on youtube about this and others in the price range like the KZ ZS10 pro, Mee audio M6 Pro, Fiio FD1, etc and finally pulled the trigger on these, and boy o boy, arent these a treat for your ears. Will definitely be wearing under all of my garments to retain hourglass shape. This is a very comfortable pair of slippers! Cute, comfy and theyactually fit.