Repels biting insects for hours. Contains DEET. Repels mosquitoes that may carry West Niles virus. Repels mosquitoes, ticks, biting flies, gnats, no-see-ums, chiggers & fleas. Questions or comments? Call 1-800-767-9927 or visit our website at www.cutterinsecttrepellent.com. No CFCs: Contains no CFCs or other ozone depleting substances. Federal regulations prohibit CFC propellants in aerosols.