The fan sewn into the side of an 'air-conditioned' jacket is pictured at the offices of Japanese manufacturer Kuchou-fuku in Saitama Prefecture, northwest of Tokyo August 17, 2007. Two small fans sewn into the back of each jacket and powered by a pocket-sized rechargeable battery pack circulate air across the wearer's skin, evaporating perspiration and keeping temperatures down -- a welcome respite from Japan's mid-summer humidity and record-breaking heat in recent days. (Michael Caronna/Reuters)

Workers wear 'air-conditioned' jackets at the offices of Japanese manufacturer Kuchou-fuku in Saitama Prefecture, northwest of Tokyo August 17, 2007. Two small fans sewn into the back of each jacket and powered by a pocket-sized rechargeable battery pack circulate air across the wearer's skin, evaporating perspiration and keeping temperatures down -- a welcome respite from Japan's mid-summer humidity and record-breaking heat in recent days. (Michael Caronna/Reuters)