These are the socks that use hot or cold drug-free therapy to help relieve pain associated with plantar fasciitis, arthritis, sprains, and other foot problems. The soles and heels of the socks contain removable gel packs that can be cooled in a freezer to help reduce inflammation or heated in a microwave to increase circulation and accelerate healing. Includes adjustable plantar fascia straps that secure around each foot for enhanced arch support. 90% polyester/10% spandex. Hand wash. Imported. One size. Fits women up to size 10; men up to size 8 1/2.