Are you struggling to cope with the heat outdoors? Sony might have a solution, if not as soon as you might like. The company's First Flight program is crowdfunding a wearable 'air conditioner,' the Reon Pocket, that slips into a pouch in a special t-shirt. The stealthy device doesn't condition the air as such. Rather, it sits at the base of your neck and uses the Peltier effect (where heat is absorbed or emitted when you pass an electrical current across a junction) to either lower your temperature by 23F or raise it by 14F, all without bulk or noise. You could wear a stuffy business outfit on a hot day and avoid looking like you've just stepped out of a sauna.