Heat Waves Drive Demand for Jackets With Fans - Bloomberg

Jackets and vests with the cooling technology, used for years by Japanese construction workers, are being redesigned as casual wear and marketed to general consumers as heat waves grow more frequent and intense. Although often dubbed “air-conditioned clothing,” that’s something of a misnomer, because there’s usually only a fan and nothing to actually cool the air.

Fans work by accelerating airflow to dry perspiration