Stay cool this summer while working outside thanks to the Chill-Its Unisex Economy Dry Evaporative Cooling Vest. Each economy cooling vest features exclusive patented dry technology that keeps wearer completely dry and comfortable during the entire evaporative cooling process. The cooling material is treated with an anti-microbial that prevents mold growth, always keep the cap closed to maintain vest's effectiveness and do not clean the inside reservoir. This evaporative vest reduces the effect of heat exhaustion and fights fatigue while working or playing in the summer outdoor heat. Economy cooling vest features exclusive patented dry technology that keeps wearer completely dry and comfortable during the entire evaporative cooling process Up to 3 days of cooling power to help maintain a healthy body temperature Lightweight and durable work vest made of industrial grade quality nylon Cooling material is treated with an anti-microbial that prevents mold growth, always keep the cap closed to maintain vest's effectiveness and do not clean the inside reservoir Elastic wrap waist closure allows for a customized fit Evaporative vest reduces the effect of heat exhaustion and fights fatigue while working or playing in the summer outdoor heat 25% less cooling material than a comparable size offering of the 6685 Standard Dry Vest Machine washable for convenience Ideal summer work vest for workers in pulp/paper, iron/steel, vulcanizing, foundries, etc. or for people running, biking, doing yard work, riding motorcycle and more Available in two different sizes, S/M (32 in. to 40 in. / 81 cm to 102 cm) and M/L (40 in. to 52 in. / 102 cm to 132 cm) Simply fill the vest with 13.5 oz. to 15.5 oz. / 400 mL - 450 mL of water for immediate and long-lasting cooling relief; No refrigeration or gels necessary Chill-Its Unisex Economy Dry Evaporative Cooling Vest