GRABBER

I have been using these for years deer hunting in mid-Michigan. I sit in tree stands or pop-up blinds without heat. I slip two of the Mega Warmer packs in a muff worn around my waist. I only wear light weight finger-less gloves. Hands start getting cold they go into the muff for a warm up. Just enough heat for a warm up. No smell. They would do the same job in your coat pocket. If you stop hunting (or other outdoor activity) put them in a zip-lock bag to stop the heat reaction. When you go out again take them out of the zip-lock and they will heat again. I get about 8 hours of heat out of these. Walmarts price is about 1/2 of typical sporting goods stores.