HyperKewl Evaporative Cooling Vest - Child Sport This great cooling vest for kids can be used during rest or play to keep your loved one's body temperature regulated. TechNiche has the solutions you need to beat the heat. HyperKewl Cooling Vests provide 5-10 hours of cooling relief per 2-3 minute soaking. They are lightweight, and durable. About HyperKewl Evaporative Cooling: This simple and effective technology works by combining water with our HyperKewl Fabric to create garments that gradually release water through evaporation to keep you cool, but comfortable. Typical applications include personal cooling, outdoor safety, industrial safety, construction, emergency services, military, outdoor recreation, athletics, motorcycling and equine. Simple V-neck w/ zipper closure Great for a wide range of people and uses Comfortable, quilted nylon outer shell HyperKewl polymer embedded fabric inner Water-repellant nylon liner HypwerKewl Evaporative Cooling Instructions: Soak garment in cool water for 1-3 minutes Gently squeeze out excess water Wear/Apply repeat steps as needed Hang to dry Wash with brush and delicate soap (as needed)