Mosquitoes are attracted to lactic acid, a chemical found in sweat, so as you and your family become active, be sure to use OFF! Active sweat resistant bug spray & mosquito repellent. Get up to 6 hours of protection against mosquitoes that may carry the Zika, Dengue, or West Nile virus, as well as biting flies, gnats, ticks, chiggers, and fleas. OFF! Active works on skin, clothing, and is perfect for running, hiking, playing, and other outdoor activities. Keep mosquito repellent out of reach of children and pets. See the label for other precautions and usage directions.