The Ruffwear Swamp Cooler Cooling Neck Gaiter - Medium is a reversible, everyday cooling neck gaiter for dogs that's designed to take the edge off when exploring in hot and dry weather conditions. It's an easy way to bring a bit of refreshment on the go. Just give it a soak to tap into Swamp Cooler Tech which uses evaporative cooling to help cool your pup. When dry, re-soak to recharge it. Use standalone for an everyday cooling piece, or kit with the Swamp Cooler Harness to extend and enhance the benefits of on-the-go cooling for your dog.