More than just a slide, the Oofos OOahh Slide Sandal features patented Oofoam technology, designed to cradle your arches and cushion sore joints after a workout. Absorbs 37% more shock than other materials Reduces stress on sore feet, knees and lower back Cradles your arches Biomechanically designed footbed allows natural motion Shower/beach-ready; moisture resistant; doesn't retain smell Durable OOfoam holds its cushion Machine washable.