The Ultra Cooling vest from TST provides the ultimate in body cooling. Each vest houses 17 or 21 'Temptech' elements (depending on size) which absorb temperatures above 28 Deg C. Body skin temperature is usualy around 32 Deg C so the cooling effect can be felt as soon as the vest is put on. The vest itself is made from lightweight Polypropylene which can transfer up to 40 times more moisture than Polyester. It also dries up to 3 times faster so any perspiration is quickly drawn from the body to keep you in a comfortable temperature Zone.The high elasticity of the material combined with stretch side panels provide a very close fit to provide the highest level of moisture wicking. The cooling vests are treated with an antibacterial agent which keeps it fresh and odour free.Keeping your body cooler reduces heat stress which can lead to lack of concentration and dehydration and ultimately your performance will suffer. Just 2-3% loss of body fluid through sweat reduces your performance by 2