I take public transportation to and from work and these HotHands foot insoles keep my feet warm while walking and standing at bus stop. I work an 8hr day and these warmers are still warm at the end of the day and last until I get back home. I am ready to place my second order!
This is the absolute best foot warmer out there. I have tried others, but this product is far better than the others. I hunt a lot from tree stands and my feet stay warm all day. I have hunted all day and when I take my boots off, these are still giving off some heat - not always, but often. They generally last the day, not just 4 or 5 hours.
I love these Hot Hands Foot Warmers - I won't go hunting without them :)