The Thermacell Mosquito Repeller Holster with Clip for MR300 Portable Repellers allow Thermacell users to carry and transport an MR300 Portable Repeller hands-free and hassle-free. With an internal pocket for repellent mats and an external pocket for fuel cartridges, you can always have refills handy when you need them most. Optimized for MR300 and MR450 Portable Mosquito Repellers. Also compatible with MR150 Portable Repellers. Allows for quiet and effortless removal of Repeller from Holster. Side pockets holds spare fuel cartridges and internal pocket stores spare repellent mats. Black ballistic nylon fabric is rugged enough for any outdoor adventure and is easy to clean. Heavy-duty detachable clip or built-in loop easily attaches to packs, belts, camping gear, hunting gear and many other places.