Tri-Tec 14 Fly Repellent is a water-based formula that means business. Protect your horse against six types of flies plus gnats, mosquitoes, lice and deer ticks. Also contains sunscreen. Keep a bottle in your tack box for on-the-go use and another at the barn for fast, economical refills. Keeps working for up to 14 days. Contains: Cypermethrin, Pyrethrins, Piperonyl Butoxide, Technical, and Butoxypolypropylene Glycol.