Lightweight and easy to activate, the Cooling Sport Vest uses a low cost, reusable cooling system. It can be used for a variety of applications, from keeping athletes cool as you train, to supporting construction workers undertaking physical labour. As it cleverly prevents the user from getting wet, the vest ensures cool relief over a period of several hours. The vest can be worn over a shirt or alternatively underneath uniform, depending on your needs. HyperKewl™ products utilise a unique polymer chemistry to achieve rapid absorption and stable water storage. The chemical formulation also creates enhanced evaporation and longevity. Users can expect the HyperKewlTM evaporative cooling fabric to provide temperatures that are 15–20°F cooler than the ambient temperature. The exact temperature difference will depend on humidity, exposure to airflow and other environmental conditions. HyperKewl™ Evaporative Cooling material is a unique fabric that absorbs and slowly releases water through evaporation protecting the wearer against heat stress. Simply soak in water for 1-2 minutes, gently squeeze out excess water and enjoy the cooling effect. Simple V-neck with zipper closure; works for a wide range of people and uses Soak in water to activate Can provide 5–10 hours of cooling relief Lightweight, easy to activate, and durable Comfortable quilted nylon outer with HyperKewl™ fabric inner, water repellent nylon liner, and black poly-cotton trim Adult Sizes: XS, S, M, L, XL Hot temperatures can be damaging for your health, leave you fatigued or make you less focused on work. If you do work in the outdoors, enjoy activities outside or like to keep fit, the Techniche HyperKewl Evaporative Cooling Sport Vest 6529 uses a unique fabric construction that absorbs perspiration and releases water through evaporation.