Thermacell Backpacker Mat-Only Refills, 5.25" L x 4.25" W x 1.75" H - M48

Thermacell backpacker mat-only refills effectively repel mosquitoes by creating a 15 ft zone of protection when used with the thermacell backpacker mosquito repeller. This refill does not include fuel cartridges.Features:Includes 48 hr of mosquito protection refillsMat-only refill for use in the thermacell backpacker mosquito repellerNo spray and no mess, scent-free and deet-freeActive ingredient is allethrin, a synthetic version of a naturally occurring repellent found in chrysanthemum flowersP