Design: Lightweight, minimalist construction Designed to encourage natural movement and help with recovery processes In-Shoe Comfort: OOfoam(TM) technology for minimized stress on joints, featuring 37% improved impact absorption Moisture and bacteria resistant for all-day wear, anywhere you go Additional Details: OOFOS(R) are crafted in whole sizes; for Men's half sizes, we recommend sizing down, and for Women's half sizes, we recommend sizing up Machine washable for easy maintenance