1. Material: neoprene, OK cloth, hook and loop, spandex rubber 2. Application: health care massage 3. Soft and comfortable, tight and detailed stitching, rubber non-slip sole 4. Sagging straps to adjust the sagging feet, adjustable hook and loop to adjust the size according to the individual 5. Long-term wear helps to relieve foot and heel pain associated with plantar fasciitis, Achilles tendonitis, heel spurs and tendon arch pain 6. Easy to use, wear while sleeping to improve daytime mobility and provide a deep therapeutic stretch to the plantar fascia 7. Weight: S about 57.2g, M about 64g, L about 72.2g 8. Note: delivery only one orthotic, does not include other