The Oofos OOahh Sport Flex in OOMatte Black offers exceptional comfort, cushioning, and protection with the added benefit of an adjustable strap for a personalized fit. Experience instant relief, superior shock absorption, and reduced stress on your feet, knees, and lower back, making them the perfect recovery footwear after any strenuous activity. The innovative OOfoam technology absorbs 37% more shock than conventional materials, cradles your arches for natural motion, and is made from a closed-cell foam that is machine washable, odor-resistant, and durable.