My son bought me a heated vest. Don't remember the name but it has been awesome. It gives you so much versatility, no more worrying if you have enough or to much on. Love it for AM sits. I wear it under an un-insulated shell. Walk in with it off, climb in no sweating. Then as the sun comes up and you cool off just turn it on. Great for when your traveling too. Eliminates multiple jackets. Obviously not a back country piece of equipment due to needing to recharge but I LOVE mine.
