I love being WARM! [SEP] These are fantastic!  I've used similar ones in the past but the heat in those didn't last nearly as long as these do!  I mainly purchased to keep in the car in case I ever broke down and needed to stay warm while waiting for help or if I was walking for help.  I opened one to use while doing so outside chores around the house as I hate to be cold.  I usually have to force myself to do these chores but braved the cold just to get to try out my warmers.  Well they worked!  My hands were toasty warm the whole time. I even moved them from my gloves to my stomach under my coat and it was just awesome to warm other body parts.  Did I mention...I HATE TO BE COLD! Will definitely keep these in mind for my dad and nephews as they hunt...will make a great gift to them!