The Crissy is an elevated slip-on mule heel featuring breathable criss-cross knit straps that form to fit your feet, while keeping you looking cool and feeling cool all summer long. Material: Synthetic upper/synthetic lining and sole with synthetic heel We recommend sizing 1/2 size up in this style This set includes everything you need to convert from heel to flat: The Crissy flats Flat Caps Heel Kit Stelo arch supports **This item is final sale and cannot be returned or exchanged**