This child size HyperKewl evaporative cooling vest from Techniche International features a simple V-Neck with zipper closure, comfortable quilted nylon outer with polymer embedded fabric inner, water repellant nylon liner and black cotton-poly elastic trim. Just soak in cool water for 2 to 3 minutes, gently ring out excess water and its ready to wear. The garment will remain activated for 5-10 hours and can be re-hydrated by repeating these simple steps. Evaporative cooling apparel work best in dry climates. Hand wash and line dry. Sizes available are by age: 5 to 6 years, 7 to 9 years and 10 to 12 years old. If your child is larger or smaller than the standard for their age, then make adjustment in size when ordering.