We always carry there in our pockets when we ski.... If the weather is extra-cold they are perfect inside our mittens , and keep our hands warm all day . The only reason I didn't give them 5 stars is because sometimes my fingernails get black from whatever is inside ....maybe charcoal...? no biggie, we still love these !!
Great item. Bought for camping, but the first one for to try it is out outdoor bunny who would be freezing do death if we hadn't put him in the garage with the heater.
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