I was hesitant on getting an XL and having them be giant. The heel does move freely. They look like Apple AirPods but without that high cost. Fits great and has some adjustability to it. I can run in them, I can climb in them, I can walk long distances without my feet getting tired. The crochet band straps are very comfortable on my average, medium width feet. Here’s what I found:1. Customer service had nothing good to say either, after 6 months they don’t care if their is a problem with their products. Just avoid this and buy some premium workout headphones like beats. He is an 8.