CHILD'S SIZE - HyperKewl Cooling Sport Vest - Keeps Kids Safer in the Heat - -SILVER-10-12 CHILD'S SIZE - HyperKewl Cooling Sport Vest - Keeps Kids Safer in the Heat - -SILVER-10-12 Simple V-neck w/ zipper closure; work for a wide range of people and uses Can provide 5-10 hours of cooling relief per soaking Lightweight, easy to activate, and durable Comfortable, quilted nylon outer with HyperKewl Cooling Fabric inner, water-repellant nylon liner, and black cotton-poly elastic trim