Importantly remember these are open back headphones, very open headphones. Third, the side of the heel area have vertical walls of rubber where the straps are attached and this immediately started rubbing a raw spot on the inside of my heel near my arch. The upper part is non-stretchy fabric, except the outer edges, which have a slight stretch for comfort. Bummer cause it was the best stuff for my skin. Replacing the old with these replacements is easy enough to do but the left side took more work than the right - there was so much glue residue on the left side that it took at least 20 minutes to get it all off but it was well worth it. It is also very small and not in the way. But with a tough rubber sole, will also stand up to excursions outside the house. I was probably expecting too much because of the brand maybe, but the sound quality is very. I originally ordered the 8-8. I bought these shoes because Id had a previous pair that I simply wore to death.