Thermacell Insect Repellent Refill Cartridge

Original Thermacell Mosquito Repellent Refills effectively repel mosquitoes, black flies and no-see-ums. For use in fuel powered Thermacell Repellers, Lanterns, and Torches.  Creates a scent free 15-foot zone of protection when used in fuel-powered Thermacell Repellers. Perfect camping, hunting, fishing, gardening and around the backyard. Each repellent mat lasts up to 4 hours and each fuel cartridge lasts up to 12 hours.  Active ingredient is Allethrin, a synthetic version of a naturally occurring repellent found in chrysanthemum flowers.