The Oofos Ooriginal Sandal is unisex, but the sizes shown are men's sizes. Women's sandals run two sizes higher than the men's sizes shown. For example, if you want a women's size 8, you'd select size 6. The Oofos Ooriginal Sandal is the recovery tool you need in your shoe closet. Oofos carved its Ooriginal Sandal from revolutionary OOfoam technology that absorbs 37 percent more impact than traditional footwear foams. The extra cushy foam reduces impact to your feet, knees and joints, so it’s perfect to slip on after a race or hard workout. The minimalist construction is lightweight, and it’s machine washable. Plus, the foam is moisture- and bacteria-resistant for easy cleanup.