Hat Underneath News Today

Layers of down jacket right underneath this one. take a look at what happens when we turn to this infrared camera. you see those bright spots? that is heat escaping. thats not a good thing. not all winter coats are created equal. we took that infrared camera out on the streets of boston to show how. >> youre wearing a fleece jacket. youre wearing, what, a down? shes losing heat there on the shoulders. looks like youre both pretty warm. >> i guess so. >> reporter: look at these. what do you think...