There is solid stitching around the perimeter to prevent leather separation, but really time will tell. In fact, adding the venerable Sennheiser HD 518, I judge these three headphone models are the best, full-size, open headphones that can be had under $100 on the market now. These slipper fit perfectly . But fear not, simply modifying the earbud (cutting them) to have the sensors exposed alleviates this issue. The little designer case makes to easy for me to spot among my random things. Im really disappointed because I wore croc sandals for 2 summers on a regular basis that were perfect but these are just crap size wise. Interestingly, in Scotland, all of the plug outlets I saw had switches built in, probably to conserve power. Picked this up so I could mount my phone on my bicycle. Ive been treating them roughly for months and theyve held up exceptionally well. Comfort,sound and the BASS.