For an equal dose of vibrant cushioning and sole support, Oofos Ooriginal Thong Sandals are designed with unique shock absorbing foam and an innovative footbed for the comfort your feet crave after a hike, run, or workout. . Proprietary OOfoam technology and patented footbed. Provide long lasting support and cushioning with 37% more impact absorption. Provide superior arch support for most foot types. Biomechanically designed OOfoam footbed design allows your foot to move on all planes and articulate the way nature intended. Help reduce fatigue and enhance recovery. Extremely durable, long lasting comfort maintains the OOfeel for the life of the shoe. Closed cell OOfoam is waterproof and does not allow bacteria to build up in the footbed. Soft upper. Machine washable.