For the backyard and beyond, Thermacell Mosquito Repellent Refills keep your devices running for the long haul. Featuring a 20-foot zone of protection against mosquitoes - our largest area bug repellent zone available. Always be prepared by keeping extra cartridges in your tent, backpack, or tackle box ready when you need them. These cartridges travel easily with your Thermacell Rechargeable Repeller. Mosquitoes are no small problem - they can ruin a good time with painful bites, bothersome buzzing, and days of itching afterward. Until now, DEET bug sprays, lotions, torches, and citronella have been the only options for fighting mosquitoes. We started Thermacell because we wanted a better way to fight mosquitoes. From humble beginnings, our team of entomologists, researchers, and outdoor enthusiasts has over 100 years of combined experience repelling mosquitoes, and for 20 years our mission at Thermacell has been to change the way the world fights mosquitoes. Headquartered outside of Boston, with distribution centers in Georgia, we're leading the way with better solutions to biting insects. With global distribution in 30+ countries and tens of millions of insect repellents sold, more and more people around the world count on Thermacell to make outdoor activities even better.