Simply squeeze this non-woven St John Ambulance Koolpak® to turn it cold in seconds, providing instant relief and treatment of bumps, bruises, strains and sprains. The pack is single use and disposable, making a perfect addition to your first aid kit at work or at home. The flexible design wraps around the body for greater coverage of injured areas and can be applied directly to the skin. Remaining cold for up to 40 minutes, the pack measures 138 x 280mm.