Introducing the Thermacell Standard Mosquito Repellent Mat Pack, this refill pack contains six mosquito and midge repellent mats. Each mat lasts a maximum of 4 hours. This refill pack can top up your supply of repellent mats. The mats are compatible with all Thermacell Portable Mosquito Repellers and all Lantern Mosquito Repellers. Also, the ideal refill pack for the Thermacell Backpacker Mosquito & Midge Repeller!