OFF! Active Insect Repellent, Sweat Resistant, 6oz AerosolModel No: 01810. Sweat-resistant formula lets you work up a sweat without becoming more appealing to hungry pests. Keeps biting insects away. Protects against mosquitoes that may carry the West Nile Virus, biting flies, gnats, ticks and no-see-ums. Convenient and easy to use. Provides protection for up to 6 hours. Active ingredient: 15 percent Deet.