If they were bigger they would get 5 stars - mainly because I use them for back pain. They stay warm for about 8 hours and the glue sticks very well to clothing. (DO NOT put glue on skin.) The price is great and the package slips easily into your purse or travel bag to keep you warm or relieve pain on the go. I usually buy them from the dollar store, but they only have stocks for a short time during the winter, so this is the best option for me.
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