purchased this dickie on amazon and was able to test it out today in 40 degree temps this morning and 32 degree temps this evening and my chest felt very comfortable. Other than my electric gloves, I find all the other heated stuff on the expensive side, so I usually dress in layers. So far this has worked for me during the colder seasons. here's the link if anyone's interested. https://a.co/d/erHnDTD