Transcript for Best Coats to Stay Warm and Avoid Losing Heat
Arctic blast the Arctic cold is not going away soon so we ask ABCs -- -- -- for kind of survival guide tonight. To the best coats and a reality check on how much heat we really lose how fast. Emergency rooms tonight getting ready for an influx of frostbite and hypothermia. Look how fast heat seeps out when you're not bundled -- watch this had. Remove the glove and in less than sixty seconds the orange and yellow he disappears and frostbite begins so right now I'm wearing three layers a down jacket right underneath this one but take a look at what happens when we turn to the infrared camera -- see those bright spots right there all of that is heat escaping and that's not a good thing. Not all winter coats are created equal and we told that infrared camera out on the streets of Boston to show -- to -- wearing a fleece jacket you're wearing like a watered down. She's losing -- there on the shoulders that looks like you're both very. And look at these three -- feel the -- I don't. Even with those layers look at her -- heat escaping right through it. But her friends zipper is covered up by a wind -- he's -- and -- -- -- -- is the answer -- -- a lot of credit for your jacket. The warmest winter coat is -- down coat the longer the better with a label -- 65800. Bill. It has a zipper covered with that -- -- a waterproof exterior and an insulated hood with a draw string you'll still want to Wear a hat underneath. GO but he tells ABC news Boston. And our extreme weather team will be staying out of this storm undercover at all.
This transcript has been automatically generated and may not be 100% accurate.