Thermacell takes pride in creating products that are highly effective and make being outdoors more enjoyable. Thermacell products have been field tested by the Department of Defense and are endorsed by the North American Hunting Club, Good Housekeeping Institute and Parade Magazine.

Thermacell Insect Repellents Use Allethrin for Ultimate Protection
The key to creating Thermacell’s unique 15 x 15-foot zone of protection is allethrin. All devices operate on a single butane cartridge, which heats a repellent mat releasing allethrin, a synthetic copy of the natural repellent found in chrysanthmum flowers. It repels mosquitoes, black flies, and no-see-ums, and will not harm humans or pets.
Within minutes after turning on the Lantern or Appliance, the repellent creates a 15 by 15-foot (225 square-foot) area of repellency, the size of an average deck, patio, or campsite.

One refill includes 3 mats and 1 cartridge, for a total of 12 hours of repellency.

2. Thermacell R4 Mosquito Repellent Refill 48hrs Value Pack

The value pack provides 48 hours of repellency (12 mats and 4 cartridges).

3. Thermacell R10 Mosquito Repellent 120hrs Super Value Pack