These are good hand warmers. If you buy this 10-pack, they should last through several cold outdoor events... and they are cheaper than buying them separately anywhere else.
I wouldn't be able to ski without these hand warmers. Even with super-insulated ski gloves and glove liners, I still need inserts like this. I also fold up the Wicked Good Toe warmers to insert in the "thumbs" of my gloves. Buying warmers in bulk quantities through LLBean is more economical than buying them "as needed" at on-mountain ski shop. Plus, I always have extras to lend to ski companions who complain of cold hands.
I use these when my Raynauds disease in my right foot causes my foot to react to the cold and become uncomfortable. They have saved me from much discomfort on cold nights. I love them!
Bought these hand warmers for future use at Buffalo Bills games next fall. We tend as one may expect to see a good bit of wind and cold in Buffalo. Having these hand warmers will be very big then.