Thermacell Mats with Butane Refills is a great 12 Hour Refill Pack which includes 3 x 4 hour mats and 1 butane cartridge.
Mats:
Each mat lasts up to 4 hours. Mats can be stored for long periods of time
A mat can be used for short periods of time - just turn unit off and restart when ready
When time between uses is more than one week, store the mat in a cool, dry, dark place
The Insect repellent is Allethrin, a synthetic extract from the chrysanthemum flower
Fits all Thermacell Appliances and Lanterns
Butane Cartridge:
Each cartridge lasts up to 12 hours
Cartridges can be stored for long periods of time
A cartridge can be used for short periods of time - turn unit off and restart when ready
Fits all Thermacell Appliances and Lanterns except Backpacker that operates on camping gas cartridges