OFF! Active Aerosol. 15% DEET formula. Sweat resistant OFF! Active repellent protects against mosquitoes that may be carrying the West Nile virus, biting flies, gnats, ticks, no-see-ums and a variety of other biting insects. Also repels black flies, biting midges, deer flies, and chiggers. Non greasy formula won't stain clothes. Repels mosquitoes for up to 5 hours. Includes twelve 6 oz cans per case.