Economical 5" x 6" size perfect for smaller bumps and bruises. InstaKool™ Instant Cold Packs deliver immediate cold therapy for first aid, providing comfort and reducing swelling after an injury. Revolutionary formula is the first instant cold pack with National Security and Safety in mind. InstaKool™ is a urea-based formula that is Ammonium Nitrate-Free and rivals the temperature ranges of previous cold packs. Exceeds American National Standard - Minimum Requirements for Workplace First Aid Kits (ANSI Z308.1-1998). Made in the USA.