They are very uncomfortable to wear and rub at the straps each time I wear them. This product is awful! This is the third pair of Reef Leather Fanning sandals Ive purchased after purchasing two non-leather Fanning sandals as these are the only flip flops that fit me and dont fall off when I walk and are extremely comfortable. Because of the nature of the open back, bass essentially gets lost. Dont think I will buy Columbia shoes again. However the clip pinched my skin. Hope this wasnt too long winded for someone to skip over what could potentially be harmful. It was time to get him a pair. I read all the reviews about the fit before ordering them and was concerned but thought they were so cute that I needed to try them. I simply turn up the volume on the screen to listen!