Amazon.com | OOFOS OOahh Sport Flex Recovery Sandal, Black 。agile foam strap for additional support and comfort. Like every OOFOS shoe, it features OOfoam technology & the patented footbed. OOfoam Technology - Our revolutionary OOfoam technology absorbs 37% more impact than traditional footwear foam materials to reduce the stress on your feet, joints & back. Plus, the closed-cell foam is machine washable and designed to minimize odor. footbed cradles and supports arches to reduce energy exertion in the ankles by up to 47% compared to competitors’ footwear OOFOS reduce load, decrease compressive forces, and support foot mobility when compared to traditional footwear. As a result, every OOFOS style carries the American Podiatric Medical Association Seal of Acceptance! Made for Recovery excellent used condition