RE: heater body suits??
ive used mine for 3 years now and it makes an unbelievable difference. i bought my brother one this year and last week he used it for the first time in 17 degree weather. he said that in less than 30 dergree weather he would never go hunting without the heater holster. although the pockets are big and they recommend the bigger type body warmer packs i just use the plain old hand warmers because its cheaper and it works great. you can get a case of the hand warmers pretty cheap on ebay or other online places. i thought of this idea years ago and also thought about sewing similar mesh pockets in my hunting long underwear. be careful to not put those heat packs next to your skin because it will leave red burn marks.