Repels mosquitoes up to 10 hours. Repels mosquitoes that may carry West Nile virus. Notice: To the extent consistent with applicable law, buyer assumes all responsibility for safety and use not in accordance with directions. Questions or comments? Call 1-800-767-9927 or visit our website at www.cutterinsectrepellent.com. Contains no CFCs or other ozone depleting substances. Federal regulations prohibit CFC propellants in aerosols.