Horse fly repellent supplement. Works naturally through the body's system to create an invisible shield-like effect all over the horse, providing 24 hour comfort from fly nuisance. The granules are dust free and can be safely added to any combination of feed or supplements. Contains 15 different herbs and spices which when consumed exude an aroma through the pores in the skin to deter biting flies and midges. This product is BETA NOPS approved.