Hi Kristen, welcome to the board. I' ve never used the Heater Body suit but when I' m hunting in a box stand I use a sleeping bag. I' m in North Carolina where we don' t have very cold winters but I' m a big wimp when it comes to being cold. Anytime it gets below freezing I have a really hard time staying warm. I' ve also used the Hot Hands which help quite a bit.