1) The sound quality is fine, and there are 3 built in equalizer profiles. I will say Dansko was better at absorbing sweat and odor, just from personal wearing experience. He purchased these because of their excellent support. The size is correct, and fits well. The most important thing is for the strap and handles to be sturdy enough, and they are. The didnt have my exact size (10 1/2) so I got the 9-10 size instead of the 11-12 size, thinking a little tight is better than too loose. Esto le da una mucha mayor resistencia y estabilidad. Unfortunately these sneakers just don?t live up to the support and comfort I?ve come to expect. The quality sounded ok for wireless earbuds, but I wouldnt recommend them for the price, especially with the defect many of them face. The look of the sandals is casual but really you can wear them with dresses and skirts without looking as if you are going to the beach.