It's simple science: There is nothing more effective at reducing the rising body temperature than the pure FROZEN WATER in Flexifreeze. The CoolerDog Cooling Vest and Collar cools dogs on the underside of their belly and neck (where veterinarians find cooling to be effective). When used appropriately the vest is safe and durable for dogs by using 100% USA water in the FlexiFreeze Ice and rip-stop nylon for materials. Built out of love for dogs, this cooling vest is ready to keep your dog SAFE and COMFORTABLE on your next adventure. Features: Easy to put on. Can be worn independently Adjusts to hold vest securely in place 2 Sets Of Ice Sheets with two sets of FlexiFreeze ice sheets, you can keep one in use and one in the freezer, ready to battle the heat Vest and collar are made of ripstop nylon for lightweight durability and neoprene to maximize the cooling power of the FlexiFreeze Ice for your dog Can help to prevent canine heat stress No-pinch buckles to ensure comfort of the dog (and you!) Made from durable ripstop nylon Worry free FlexiFreeze Ice is filled with 100% USA water to keep your dog safe and cool Lightweight for peak comfort and effectiveness 3 easy steps to secure the vest on your dog Perfect for trips and traveling in the heat Small to pack away, easy to put on, durable for your dog Out-performs similar products Helps prevent overheating Veterinarian approved Machine washable, no pinch buckles Simple design allows for great Flexibility in 4 sizes Specifications: Size: Medium Measures: 12.5" x 7" x 3.5" Weight: 0.75 lbs with FlexiFreeze Ice Fits up to 27" Girth Includes: 1 - Cooling Vest 1 - Cooling Collar 2 - Sets of FlexiFreeze Ice Washing Instructions: Remove FlexiFreeze Ice Machine wash vest and collar, hang to dry Wash FlexiFreeze Ice with soapy water, rinse and pat dry Do not bleach, iron or dry clean Cooler Dog Cooling Vest and Collar - Medium