Help prevent canine heat stress with the Cooler Dog Ice Vest and Cooling Collar. Ideal for hot days, humid climates and breeds prone to overheating. Just freeze the pure water FlexiFreeze and place it in the Vest where it will pull heat from underneath your dog’s body (Yes…underneath! Veterinarians agree this is more appropriate.) The Cooling Collar also utilizes the same technology and can even be used independently. Its simple science: There is nothing more effective at removing the rising body temperature than the pure FROZEN WATER in Flexifreeze. Simple design allows for great flexibility in 4 sizes. Completely washable, no pinch buckles. Extra FlexiFreeze is inexpensive and readily available. We recommend bringing a couple extra Cooler Dog Ice sets along in your FlexiFreeze 9 Can Cooler to keep your dog cool all day long!