2014 Ram Promaster 2500 159" diesel
A modern bed warmer. Get 8oz freez packs in a vinyl pouch, put inside two thick socks microwave for about 30 sec. "CAUTION WILL GET HOT AND BURN" I like to check every 10 sec and squeeze to mix the gel. These will stay warm for over an hour. I like to use them as portable heating pads for a stiff neck. You may need to adjust heating time for your microwave.