OOFOS(TM) OOAHH SLIDE :: Get cushiony comfort that just might make you say "ooh!" with the OOFOS(TM) Ooahh Slide. Let your feet take a break and your body recover after working out or a long work day in this lightweight slide sandal. Score a supportive customized fit from the Flexible OOfoam technology that conforms to the shape of your foot and absorbs more impact than standard foam used in footwear. You can count on these fantastic sandals to hold up for the long haul thanks to their water-resistance and lasting durability and taking care of them is a snap because they're machine washable too! Unisex sizing is in men's D width. Women size down 2 sizes. Ex.: If you are a women's size 7 in your running shoe you will choose unisex size 5