Repel Insect Repellent Sportsmen Max Formula 40% DEET repels mosquitoes, ticks, gnats, biting flies, chiggers and fleas. A tough repellent for any adventure, this formula contains 40% DEET. This insect repellent is designed specifically for outdoor enthusiasts exposed to the toughest conditions. Repels mosquitoes that may transmit the Zika, West Nile, Dengue and Chikungunya viruses. The easy-to-use aerosol spray stores nicely with outdoor gear or in your backpack. Take everywhere for effective, long-lasting protection. DEET has been used as an insect repellent in the United States for more than 50 years. It's recommended for those spending longer periods of time outdoors, in more heavily infested conditions. Recommended by the Centers for Disease Control and Prevention for effective, long-lasting protection against mosquitoes, DEET is also an effective repellent for ticks. DEET-based products are available in a wide variety of Repel formulas, including aerosols, sprays and wipes. DEET insect repellents with 30 percent concentrations or lower can be used on children ages 2 months and older.