Warm...at least for a little while.
Verified Buyer Reviewed by William in Nashville from Nashville, TN on Wednesday, January 20, 2010
These work pretty well in low oxygen environments (shoes)...however the 5+ hours claimed on the pckg. is being a bit liberal with the numbers. Its closer to around 2 hours. But hey...two hours of comfort is better than zero hours of comfort when your feet are cold!
- Best Uses: When your feet get cold
- Cons: Short life span
- Pros: Warm
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