The strap is very coarse where it touches the foot. Bought as a gift for me niece and loved them so much I had to get my daughter a pair. I?m Very satisfied with my order. The lights are fine, but not that interesting to me. When they arrived they were really cute! Fitting is awful. the glues hold up very well. The best drying rack ever! In the product description it has indoor cycling. I feel they sound the best and are very comfortable.