Thermacell Standard Mosquito Repellent Refill Pack (3 Mats & 1 Gas) 
The Thermacell mosquito repeller refill standard pack contains 1 butane cartridge and 3 insect repellent mats. 
Each cartridge lasts up to 12 hours and each mat lasts up to 4 hours.
The repellent mats utilize the synthetic chemical allethrin that repels up to 98% of mosquitoes, black flies, and other pests.
The mats feature an earthy, natural dirt scent that helps mask human scents.
Once warmed up, the unit provides protection to a 4.6 x 4.6-metre zone.
Contains 1 butane cartridge and 3 repellent mats
Flame-free repellent ensuring safety
Effectively repels mosquitos, black flies and other flying, biting insects
Silent and virtually odour-free protection from biting insects