Made for use when hydrotherapy treatment is essential but there's no ice on hand. The cold packs reduce swelling by evaporation. Refrigerate them and they're cold again in no time! The crystal packs look like a sort of shipping boot. It covers the entire canon bone and tendon area. It is made of a dense nylon fabric with foam inserts. There are crystals inside in "pockets". Once the crystals are wet they will expand and become gel-like. Once the boot dries, the gel then dries back to the original crystal state.
2 to a set
Size: 13" x 14"
Colors: Black, red, blue/royal, and green.