An evolution of the OOriginal, featuring an agile OOfoam™ strap for additional
support and comfort. OOfoam® technology absorbs 37% more impact than traditional footwear. Proprietary footbed design reduces stress on knees, ankles and other joints. Closed-cell foam is machine washable and designed to minimize odor. Feel the OO PromiseTry any pair for 30 days risk free. If you're not 100% satisfied, you can send them back at no cost.