The Dry Cooling Vest cools your body during hot summer days by the evaporation of water. The heat from the body and the surrounding air make the water inside the vest vaporize. It causes the surface of your skin to cool down before you become sweaty.
If the reservoir is empty, simply reload by adding 500 ml of tap water and you are ready to stay cool for up to three days. Completely filled, the vest never weighs more than one kilogram. By cooling the vascular system the chances of suffering thermal stress is drastically reduced.