If one accessory ruled this summer, it wasn’t raffia beach bags or bug-eyed shades. The handheld fan – frantically flapping in festival crowds, whizzing silently on public transport or draped over shoulders as a resourceful, futurist-apocalyptic form of neckwear – is now a summer staple. But what sets it apart from polka dot capri pants or split toe footwear is that it isn’t really a trend at all. It’s a crucial adaptation for living in a hotter world.Since men’shellip;read more raquo;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;View Gallery (32 images)nbsp;