As temperatures soar above 40 degrees Celsius, sanitation authorities in China's Jiangsu Province have issued batches of ‘air-conditioned vests’ to frontline sanitation workers to help them cool down while working. Equipped with two quiet cooling fans and powered by a portable battery pack, the vests circulate air to speed up sweat evaporation, helping reduce heat stress during long hours in the summer sun. Powered by power banks, the vests last three to four hours on a full charge. Recharging during lunch break keeps them running for afternoon shifts. #china #sanitation #technology