Thermacell Refills 12 Hours

The ThermaCELL Mosquito Repellent Refill protects campsites, patios and other outdoor areas from mosquites, black flies and no-see-ums for up to 12 hours. The repellent is allethrin, which effectively targets the nervous system of these insects effectively paralyzing them before dying. This chemical is so effective that it is used by the U.S. Department of Defense. The refill cartridge is compatible with all ThermaCell appliances and lanterns.