Phone audio quality is outstanding and listeners on the other end report that the mic delivers good performance. - The cloth covering on the wrist rest is somewhat loose, so over time I can see it becoming looser and wrinkly. So I think every color has a different quality. I dont like the fact that you can not tighten the string down just the velcro. The large-xl size fit my feet with no problem at all. I was hoping these sandal would fit as the clouds do but unfortunately they do not. My sons and husband wear the same size so we keep extra in the hallway for family visitors. I really wanted to like this cover for my buds. Theyre not so bad as to irritate the skin between your toes, but it does make them much less comfortable. That makes me regret my purchase, because these were supposed to be that one pair of shoes I’d take with me for winter travel.