I kept the earphone on for an hour, just to measure comfort level. I washed my first set accidentally and one of the buds survived through the wash. The cooler isnt cheap. Excellent for filming. He wanted something he could just slip on and now they are his go to shoes. Sadly, I have very wide feet so the front strap is a bit snug but I will persevere as they are so lovely! Wish they would have fit. My standard cable will not work so I use the one supplied but it is very short. I quickly became addicted to these slippers. Overall very sturdy and it looks nice.