Bulletproof vest features built-in cooling

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Sportswear has been considerably refined over the years for enhanced breathability and performance under various weather conditions, but improvements to protective gear that must be worn by police officers and others in the line of duty have been less forthcoming. Enter Swiss Empa, which has created a new bulletproof vest with built-in air conditioning. Kevlar is the material that gives many bulletproof vests their protective properties, but along with that impenetrability comes a lack of breathability. For the wearer, the result is considerable discomfort and a tendency to sweat profusely in warm weather. Empa's solution includes an integrated cooling system…

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