This mosquito, tick and biting fly repellent spray can be used on both horses and humans. Sprays upside down for easy application. 12-hour protection for humans from mosquitoes and ticks including mosquitoes that may transmit West Nile Virus, Chikungunya, Dengue and Zika and ticks carrying Lyme disease and tick-borne encephalitis. Non-aerosol silent continuous spray mist for complete coverage. Won’t damage leather or synthetic materials.