If your son is serving in an area that has really cold winters, he will love this product!  For up to 8 hours, this will keep his hands warm.   

 

Simply take the warmers out of the package, squeeze them to activate the contents, and put inside a pair of gloves or inside a jacket and feel it do its magic.  Sometimes, parents don't realize their sons are out in the cold weather all day going from appointment to appointment with no success.  On such days, a little heat boost can go a long way to make your missionary comfortable while tracting.