Perfect for my daughter. Sweat damaged on first run. I just replaced these a few hours ago before writing this review. Seller questions suggest having Apple fix them at a repair location. The paint has also chipped off of the buckles, and I have never had this issue with leather birks. My less expensive portable towel warmer does the job much better. Yet to wear them for an extended length of time. I?m a diabetic with several disabilities and one of my very biggest pet peeves is never being able to find a pair of shoes/slippers that allow me to be a grown-up and put on my own shoes! 5 MTB with full suspension with no issue. I put in on at the gym before getting on the treadmill for 45 minutes and then using the machines for arm day.