Sun WillThermal Underwear for Men & Women, Winter Clothing with Heated Baselayer for Indoors, Outdoors, and Sports

I've only used these 3 times so far. But they heat up quick and I feel the heat penetrating through my body. I've only used them in slightly cold weather so far (I always want to be super warm) but they get hot quick and I had to turn it off some of the time. Which is a good thing! I think the batteries might last 4 hours on full strength. I didn't time it though. I may buy some spare batteries...

So the sizes run small . I went up a size when I ordered. Realistically if I had known I would have ordered 2 sizes larger than my normal .As far as function , They will warm you up for sure and the battery life is decent . My gripe is the placement of the power button on the long underwear , it is at the waistline and was turning on and or going through the power settings when I was sitting ( I used these for hunting ) . It was a minor inconvenience . Overall , for the price and time of delivery this product is great .

Went to Chicago for Christmas.. I didnt even have to use the heater... keep me warm enough without it.

The size, look and feel are good .. those get 2 stars. Could not use bc no charger came with suit

These are awesome! Bought them for a military exercise in Korea. I plan on wearing them every day for a month so I will come back in to edit my review based on the experience. Alot of people complain about red marks, but the simple solution is that there are 3 levels of warmth. Dont wear them on high