I want one of these.
AeroVest Survival Vest
The 2 oz. AeroVestâ„¢ is compact, lightweight and inexpensive insurance against emergencies. It packs up smaller than a deck of cards yet inflates into a full sized emergency vest that shields you from wind and rain. The silver lining refects radiated heat back to you while the 18 air pokets insulate you from the cold. …
* 18 air pockets help keep heat in, cold out.
* Your 98.6 degree breath provides instant warmth
* Bright Yellow/Orange exterior for increased visibility in an emergency
* AeroVestâ„¢ comes in a single size that can fit teens and adults up to XL (men’s 46 jacket)
(via Hiking H.Q. forum)