This single use disposable pack is a convenient addition to any first aid kit and is especially suitable for sports and other physical activities where bumps, strains and sprains are possible. Simply breaking the small internal bag of water quickly activates the Urea crystals to give up to 25 minutes of ice cold therapy.

Comes in 2 sizes 27cm x 13.5cm or 15cmx15cm 
The also come singular or in packs of 6.