I bought this cause I needed a way to move across the country with my bike. Sturdy, good shoes, but the heel tab is sewn on in a way that makes a bump right on the achilles tendon and can cause irritation/blisters “Memory Foam” disappeared within a week. I even sized up for comfort so its not that they are too tight. I tested the distance and got to a little over 30 feet before the sound started cutting out. She noticed my Galaxy Note 10s Plus aas the same charger like hers. I loved that this head phone would pick up the sound when I was listening to a you tube video so I could listen to videos in the car and no one else was bothered. It does not look like the strap is removable. I wore them for 4 hrs. Beautiful and he loves them