I was going to return them but the person through away the box, so wrote off as a loss I use the other straps for extra stability as needed. A arrivato in anticipo. Shoe looks great too bad I cant give it to her as planned. I had my fingers crossed, but they fit my feet perfect! I have pairs in multiple colors. I was very surprised by the quality - to look at them you would NEVER know that they are rubber! This chair is an insane value. I mainly wanted something for short walks home and the gym. it takes one AA battery.