Thermacell Mosquito Repellent Refill, 12 hrs. is designed to keep mosquitoes away effectively and conveniently. This refill kit includes one butane cartridge and three insect repellent mats, making it compatible with all ThermaCell mosquito repellent devices. It provides up to 12 hours of continuous protection, ensuring you can enjoy your outdoor activities without the nuisance of mosquitoes. The easy-to-use refills make maintaining your ThermaCell device simple and hassle-, delivering reliable insect repellency whe you need it.