K&H Cool Bed III Cooling Dog Bed / Pad / Mat (Blue, Medium - 22" x 32" x 1.5") Award-winning, uniquely engineered cool core diverts liquid throughout the bed, providing advanced cooling power to keep your dog comfortable on those hot summer days. No electricity needed. Simply add the recommended amount of water through the Easy Fill Cap, and adjust the desired comfort with the all NEW Regulating Air Valve. Improved, tougher than ever nylon and vinyl exterior is easy to clean and convenient for both indoor and outdoor use. Aids in health issues like arthritis, hip dysplasia, calloused elbows, skin conditions, and more. Backed by a 2-year manufacturer warranty.