An evolution of the OOriginal Thong, featuring an agile OOfoam™ strap for additional support and comfort. Holds tight and conforms to your foot to ensure incredible impact absorption, arch support and natural motion. Ideal for post-workout recovery — with moisture and bacteria resistance that make it great for the shower. OOfoam™ technology absorbs 37% more impact than traditional footwear. Unique footbed design reduces stress on knees, ankles and other joints. Closed-cell foam is machine washable and designed to minimize odour. OOFOS are made in whole sizes. They recommend sizing up if you’re a women’s half size or down if you're a men's half size.