Description For use in fuel-powered Thermacell Repellers, Lanterns, and Torches Each repellent mat lasts up to 4 hours and each fuel cartridge lasts up to 12 hours Our synthetic allethrin formula is inspired by repellent extracts found in plants. Independently tested and EPA reviewed for safety & effectiveness. People and pet friendly. Backed by the Thermacell Satisfaction Guarantee. See packaging for details. Includes: One 12-hour fuel cartridge, and three 4-hour repellent mats