Flys-X® is a versatile, economical, ready-to-use insecticide. It leaves no oily residue and can be applied directly to horses, pets, livestock, and barns. Made with natural Pyrethrins, it protects your animal from flies, lice, mosquitoes, and gnats. It can even be applied to surfaces to control cockroaches, ants, beetles, spiders, crickets, cadelles, mites, and mealworms. 32 ounces.