Coghlan's Solid Fuel Pocket Hand Warmer
I have used solid fuel handwarmers for 30 years. …
I have used solid fuel handwarmers for 30 years. They put out more heat than the chemical handwarmers and each fuel stick lasts for hours. If you want even more heat you can light both ends of the fuel stick.
The down sides are that you need to light them which can be touble if you don't have shelter and they are a bit too bulky to slip into gloves.
Here's what other sites are saying:
Fiberglass insulated case with felt cover.Uses solid fuel sticks that ignite easily and burn up to 10 hours.Complete with fuel stick. Wt. 4 oz.Dimensions: 4.5in. x 2.75in.