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) and are compatible with the essential Thermacell Backpacker Mosquito Repeller. Each mat contains four hours of protection from pesky mosquitoes and have been evaluated by the EPA 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 scent 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!USAGE TIPS: Do not attempt to use with refilled canisters, Allow gas to flow for 5 seconds before clicking the piezo ignitor, and Only compatible with valves designed to the EN417 specification. INCLUDES: One repeller, three 4-hour repellent mats, and one water-resistant travel bag. Requires camping gas canister (not included). ADVENTURE READY DESIGN: Lightweight design shaves ounces out of your pack (114g 4.0 oz). Compact size (97mm H x 50mm W x 67mm L). Dependable performance up to an elevation of 7,000 feet (2,133 meters). Fuel efficient with up to 90 hours of run time on a 4 oz canister and up to 360 hours on a 16 oz canister. 100 SATISFACTION GUARANTEED: Extend warranty to 2 years with registration (automatic 1-year warranty included). Backed by Thermacell Guarantee (see packaging for details). PROPRIETARY FORMULA: Independently tested and reviewed for safety effectiveness. People and pet friendly. Always use as directed. REPEL MOSQUITOES IN AIR, NOT ON YOUR SKIN: Repel mosquitoes without DEET sprays or lotions on your skin. Unscented repellent mats last up to 4 hours each and change color when time to replace. No smoke, no flame and easy to refill. EFFECTIVE 15FT 4,5M ZONE TECHNOLOGY: Engineered to precisely diffuse repellent, creating a 15- foot (4,5-meter) zone of mosquito defense. Consistent repellent defense won't weaken over time. Powered by a camping fuel canister (not included). MOSQUITO DEFENSE THAT WORKS: Thermacell effectively keeps mosquitoes up to 15FT 4,5M away. Works fast, max defense in 15 minutes. Easy to use. Portable device is ideal for backpackers, campers, hunters, and other outdoors people. Weighs only 4 oz.