The C101 Disposable Instant Cold Packs are essential for immediate first aid and emergency treatment of larger injuries, providing instant therapeutic cold without the need for refrigeration. By simply squeezing the pack to rupture the inner bubble, a chemical reaction is triggered that drops the temperature of the pack instantly. These larger 6" x 8.5" packs are ideal for covering broader areas like the back, thigh, or shoulder, making them a staple for athletic trainers and emergency kits.