E3 Fly & Insect Repellent for Horses is an all-natural repellent with no pesticides or harsh chemicals. Helps keep bothersome biting insects away from your horse or pony for a more enjoyable ride and less stamping and tail swishing in the corral. With a unique combination of oils, E3 Horse Fly Spray repels biting insects including mosquitoes, no-see-ums, gnats, chiggers, ticks, and deer flies. And best of all, it's safe for you and your horse. E3's natural formula contains no pesticides or harsh chemicals that can irritate your horse's skin - or the rider's skin. The essential oil ingredients, including Citronella Oil, Peppermint Oil, Cedar Oil, and more, give this fly spray for horses a pleasant scent.