Inflatable Insulated Clothing:

 I am surprised this idea has not taken off more given that it is (trapped) air which is the insulator in all warm clothing, the more air trapped per unit weight being the yardstick for cross comparison. A product known as Aerovest (http://www.survivalmetrics.com/store/Item/id_aerovest_emergency_survival_vest) was available a few years ago. This provided a waterproof inflatable mylar […]

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