INSTANT EVAPORATIVE COOLING - Soak the cooling dog vest in water, wring out, and put it on - the advanced evaporative cooling technology instantly lowers your dog's body temperature and lasts up to 60 minutes per soak. For enhanced cooling, refrigerate for 10 minutes after soaking ENGINEERED 3‑LAYER COOLING FABRIC - This cooling jacket for dogs features an outer mesh that rapidly wicks water for quick saturation, a middle absorbent cotton layer that locks in moisture for extended cooling, and an inner mesh that evenly distributes the chill across your dog’s body. This triple‑layer system maximizes evaporative efficiency while keeping your pet dry, comfortable, and heat‑free SUN & HEAT PROTECTION - Light-colored reflective fabric deflects direct sunlight, while the cooling system of this cooling vest for dog actively draws heat away from the body to prevent overheating. Essential for high-risk breeds (French Bulldogs, Pugs, Boxer, thick‑coated breeds like Huskies & Golden Retrievers, dark-coated dogs, dark-coated dogs), seniors, and any dog prone to heat-related issues. Helps regulate body temperature and reduce excessive panting EASY 2-STEP WEAR WITH ADJUSTABLE FIT - This cooling vest for dogs for hot weather offers quick on/off with adjustable neck buckle and chest hook and loop closure, ensuring a snug yet non-restrictive fit for all sizes. Built-in D-ring for direct leash attachment - no separate harness needed. Perfect for summer daily walking, hiking, camping, beach parties, boating trips, and other outdoor events LIGHTWEIGHT, VERSATILE & MACHINE WASHABLE - Whether you need a small dog cooling vest or a large dog cooling vest, you can find one at OUOBOB. This cooling vest features breathable mesh that allows full range of motion. Suitable for small, medium, and large breeds (Poodles to Golden Retrievers). Reflective trim enhances low-light safety. Machine washable for easy care and daily reuse OUOBOB Dog Cooling Vest is a lightweight, premium cooling solution designed for active dogs in hot weather