Keep your pooch comfortable on even the hottest days. This lightweight cooling vest uses a evaporative cooling process to keep your dog's temperature down. Unlike some of the soggy competition, this vest stays lightweight even when wet, allowing your dog to comfortably continue their summer activities. Sizing: 21" Length 21-30" Girth for dogs 30-50lbs * Always keep an eye on your pet and watch for signs of overheating.