Repel 100 Insect Repellent is formulated for severe insect conditions. Repels mosquitoes that may transmit the Chikungunya, Zika, Dengue and West Nile virus. It provides effective long lasting protection from mosquitoes, ticks, chiggers, black flies, sand flies, deer flies, fleas and other biting insects. Repel 100 Insect Repellent protects for up to 10 hours. Convenient application whether you are in the woods or on the lake.