TechNiche Evaporative Cooling Pullover Vest Powered by HyperKewl Plus HyperKewl Plus Evaporative Cooling material is a unique fabric that absorbs and slowly releases water through evaporation. When the water evaporates, a cooling effect occurs. We look at this process as "super-charging" the body's natural cooling process, thereby helping the wearer to combat heat stress. Features: Pullover style vest String tie closure on sides HyperKewl Plus fabric interior (68% polyester, 32% polymer) 100% Taslan water repellent nylon interior liner 100% polyester ANSI CL II Compliant fabric Exterior Can provide 5-10 hours of cooling relief per soaking Lightweight, easy to activate, and re-usable How to use: 1. Soak your HyperKewl Plus item in clean water for 2-3 minutes. 2. Gently squeeze out the excess water. 3. Your HyperKewl Plus item is ready to wear. The garment will remain activated for 5-10 hours and can be re-hydrated by repeating these simple steps. TechNiche TechKewl 6550T Evaporative Cooling Pullover Vest Powered by HyperKewl Plus