Can't say enough about this product. I have been wearing thee for the past 4 years. I don't spend one day between November and March without these in my boots. I put them on in the morning and they last all day. I am in my late 50's and I work outside; by wearing these my circulation stays good and my toes don't get cold. My son lives in China and he wears them with the same results, and it gets a lot colder where he lives. GREAT PRODUCT!
The first time I used the warmers, my feet became Happy Feet! Have not tried them for very cold climate yet...32 degree night only thus far. Will update review after weekend in January in NYC.
I have used this product in the past. I have checked many places and overstock had the best price and shipping price around. My order was processed and received in a very timely manner. This product stands up to its word. 5 Hours or more of heat. Great for all outdoor sports in cold weather!
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