I have purchased and used these hand/foot-warmers several times, both this year and last. While they are not a cheap method of heating cold toes, they are amazing and they "do exactly what they say on the tin"! I have a favourite pair of fashion boots that I wouldnt dare wear in the sub-zero temperatures we have had recently, unless I was also wearing a Mycoal footwarmer also. I was collecting money outdoors at Christmas this year for the Homeless and my hands would have dropped off, had it not been for the hand-warmers tucked discretely in my gloves. Great product for those people, like me, who suffer from bad circulation or are just plain "cold".