The Oofos OOahh Sport Flex in OOMatte Black offers all the comfort, cushioning, and protection of the original, with the added benefit of an adjustable strap for a personalized fit. Experience instant comfort, superior shock absorption, and reduced stress on your feet, knees, and lower back with OOfoam technology. This closed-cell foam is machine washable, minimizes odor, cradles your arches, and promotes natural foot motion. These sandals provide exceptional arch support, reducing pressure on ankles, knees, hips, and lower back. The biomechanically designed footbed allows natural foot articulation, and the incredibly lightweight OOfoam even floats. OOfoam absorbs 37% more impact than traditional foams, reducing stress and promoting recovery. The durable OOfoam maintains its cushioning over time, ensuring lasting support and relief after workouts or long days. Moisture and bacteria-resistant, these sandals are also easy to clean and shower/beach ready. Features: OOfoam - Absorbs 37% more shock. Reduces Stress On Feet, Knees, and Lower Back. Cradles The Arches. Biomechanically Designed For Natural Motion. Moisture and Bacteria Resistant. Adjustable Velcro Strap. Durable OOfoam. Shower/Beach Ready. So Light They Float! Machine Washable.