6685 Dry Evaporative Cooling Vest offers immediate, dry cooling relief that lasts up to 3 days. Evaporative technology keeps you completely dry and comfortable compared to other vests that require soaking. Fill the vest with 13 to 20 oz. (400 to 600 ml) of water for immediate cooling relief. Refrigeration nor gels are needed to cool the vest. High humidity levels can slow down airflow and reduce cooling abilities. Antimicrobial treatment prevents mold growth. High-visibility nylon performs in toughest conditions. Design features V-neck with front zipper closure. Mesh side panels provide additional ventilation and stretch for a comfortable fit. Vest is perfect for anyone working or playing outside in the heat. It is ideal for workers in construction, carpentry, mining, landscaping and more. You can even wear it while doing activities such as gardening, running, hiking and others. Machine-wash and hang dry for longer life.