NAF OFF DEET Power Spray for Horses is a highly concentrated anti-fly and insect repellent for year-round protection from a vast range of pests. The formula is even more powerful with additional fly repellents to support the well known action of deet. A highly effect insect repellent that provides all day protection against flies and insect menace.Key Benefits Protects against flies, horse fly and insect menace Contains Deet - a well known and powerful repellent often used in human mosquito repellents Powerful and long-lasting protection Year-round protection Concentrated formulaDirections for UseSHAKE WELL BEFORE EVERY USE. Apply by spraying evenly over the horses body avoiding eyes, mouth, broken skin and synthetic fibres. Re-apply as required.