Tested, proven and trusted, Thermacell Mosquito Repellent Backpacker Mat-Only Refills are a must-have when warding off unwanted mosquitoes from any variety of backpacking areas, from dense woods and forests to ponds, rivers and marshes. Each package contains six mats (no fuel cartridges) that are compatible with the essential Thermacell Backpacker Mosquito Repeller. Each mat contains four hours of protection from pesky mosquitoes and has been evaluated by the PMRA for safety and effectiveness. Refills are easy to install: simply slide the new mat in place of the used mat, located in the device grill. Thermacell repeller mats offer a 15-foot zone of protection and come with a 100% satisfaction guarantee. The no spray, no mess, no odour and no-DEET refills provide worry-free satisfaction for outdoor lovers, keeping them effectively protected from the path of pesky mosquitoes while camping, hiking, or canoeing. It’s time to take back the outdoors. Turn it on... Mosquitoes Gone!