Usage: Simply squeeze pack (breaks inner liquid pouch, mixes liquid and harmless chemicals). Pouch contents become cold immediately and remain cold 15 - 30min (low temperature of 25F) Features; 1) Single-use cold application without the drippy mess of ice cubes 2) Requires no refrigeration 3) Convenient and portable 4) For use whenever and wherever cold therapy is needed 5) Primary usage is for outdoor activity injuries and first aid