Original thermacell mosquito repellent refills effectively repel mosquitoes by creating a scent-free 15 ft zone of protection when used in fuel-powered thermacell repellers.Ideal for use while you are camping, hunting, fishing, gardening and around the backyard.48 hours of mosquito protection refills, 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.No spray and no mess.Scent and deet-free.Active ingredient is allethrin, a synthetic version of a naturally occurring repellent found in chrysanthemum flowers.Includes 12 repellent mats and 4 fuel cartridgesDispenser Type: Heat VaporType: Refill Mat and ButaneSpecies: Mosquito, Black Fly, No-See-UmsQuantity: 4 Fuel Cartridges/12 MatsEffective Time: Up to 48 hrsScent Type: RepellentEffective Distance: 15 ftWick Capacity: 4 hrs per MatHeat Type: ButaneUv Protection: NoneContains: AllethrinHazair: Yes