Even if the sun is down you could still suffer from heat stress. That’s why you need the High Visibility Cool Vest. It features bright yellow coloring and high visibility reflective striping, ensuring that others see you as you run, hunt or engage in other low-light recreational activities. The GlacierPacks work for hours on end to keep you cool, helping you to focus on the task at hand. Featuring a heavy duty front zipper, side elastic straps and over-the-shoulder adjustability, the High Visibility Cool Vest fits a wide range of body sizes. And when you’re done, simply remove the packs, hand wash the vest with cold water and line dry.Includes one set of eight high-performance cooling packs (four large, four small)Features high visibility reflective stripesWeighs less than 5 pounds with cooling packsDry and clean, not soggy and soaking wet like evaporative productsMaintains a dry, comfortable 59°F / 15°C for up to 2.5 hours in 100°F / 38°C heatSelf-contained, portable and unpowered - no cumbersome hoses, tubes or tethersMade in the USA Glacier Tek High Visibility Cool Vest With Nontoxic Cooling Packs