The RPCM ChillyDog Cool Vest is the solution to heat stress for professional working dogs. This K-9 cooling product maintains 59 degrees Fahrenheit for two hours and recharges in minutes. Spare RPCM Cool Packs install in under a minute without removing the vest from the dog. Currently in use on numerous working dogs in domestic law enforcement and military dogs in the Middle East, it is designed to fit comfortably with or without body armor. Glacier Tek's ChillyDog weighs 2 pounds, has a leash attachment, and is 3/4-inch thick. RPCM Cool Packs can be changed without removing the ChillyDog. It contains no hazardous ingredients, which means that the cooling formula is harmless if accidentally ingested or enters the blood stream.