The Pocket Super Shelter is the only emergency survival shelter that actively heats up and warms the occupant.

It works by trapping the radiant energy from a campfire, much the same way a greenhouse traps the sun's rays. The thermal reflective material used to build the shelter then directs that heat from the fire enveloping you in warmth and comfort.  

In our test we managed to raise the internal temperature of the shelter from an ambient 24F to above 80F in less than 15 minutes, despite 30mph wind gusts.