"Enjoy life outdoors!" Those are Murphy's words to live by. With Murphy's Mosquito Sticks, you can do just that - without being bitten by harmful mosquitoes. Mosquito Sticks burn like incense, creating a scent barrier with 10% repellent oils, including citronella, rosemary, peppermint, lemongrass, and cedar wood. D.E.E.T. free. 12 pleasant smelling, clean-burning incense sticks per tube. Each stick burns 2 to 2.5 hours (wind may reduce burn time).