Nexcare™ Instant Cold Pack is specially designed for emergencies, making it great for use in the home or on the go. Keep one in the first aid kit, in the car, in your picnic basket, your backpack or travel bag and on hand during athletic events. No refrigeration is necessary -- Nexcare Instant Cold Packs can be activated immediately with a simple squeeze to the cold pack. It features a comfortable outer layer and a foam insulating layer that keeps it colder longer. Nexcare Instant Cold Pack is ideal for minor bumps, bruises, muscle aches, strains, sprains, tension headaches, minor burns and insect bites.