The strap is basically just a big piece of elastic tacked on the two sides on the sole. as expected. Please note: I was listening to a book. I bought this for my daughter after someone stole her earned charging case thinking that the earpods were inside. I LOVE my PSVR. SIX MONTHS: Still using these but most of the above issues remain the same. And given the way these are made, I dont think there would be any stretch or give. We also have a shoe cabinet a few feet away from the front door for the shoes we wear occasionally. I can wear these for DAYS and my feet feel great. I returned them and decided to give these a try.