Why choose NFTIGB body warmer:Ultra thin – They are thin so they do not take up much space of your clothes.With adhesive – You can stick the toe warmer on your socks . clothes . convenient to use.Quick and long-lasting heat – Warmers start to work in minutes after you open the package. They last warm up to 12 hours.Convenient and simple usage – Just open the package bag and air activated . then put into your jacket or pocket to get the heat.Warmers consist of 100% natural ingredients – Heat is generated by oxidation of the iron powder. After use . the heat pads can be disposed of without hesitation in regular waste (single use). No need to do external heat with electric equipment or microwave.