Repel 100 Insect Repellent provides you with up to 10 hours of protection. Spending a long time outdoors can be refreshing, but mosquitoes can bring that to a halt. This convenient 4 ounce pump spray can be easily stored with whatever gear your adventure requires. Formulated for severe insect conditions, Repel 100 Insect Repellent contains 98.11% DEET. Repel mosquitoes that may transmit the Zika, West Nile, Dengue and Chikungunya viruses, as well as ticks, gnats, biting flies, chiggers and fleas. Extreme conditions call for strong protection. Make Repel 100 Insect Repellent your bug spray essential. 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.