Cooling vests have been around for a while & have proven themselves during the hot summer days! They not only provide extra comfort, but also reduce the risk of heat stress, fatigue & loss of concentration. The Cooling Vest Dry Evo from Macna is no exception! How does it work? The vest is activated by filling it with 500ml (tap) water. Then you put on the vest (preferably in combination with a passing fan, this ensures a maximum cooling effect) & then enjoy the much needed cooling during hot summer days! The technique makes it possible! The available water evaporates through the application of a patented technology. Unlike conventional cardigans that use similar cooling techniques, this cardigan remains dry both on the inside & outside. & the useful life is many times greater thanks to the efficient regulation of the evaporation process! Fully filled has the capacity to cool one to three days, depending on the ambient temperature in which you drive. In addition to the high se...