Fly OFF Repellent is a dual action fly repellent formulated to provide your horse with maximum relief from pesky flies and insects. Two active repellents; Deet and PMD (Oil of Lemon Eucalyptus) ensure long-lasting results providing up to 12 hours protection, while moisturising oils condition and soothe the skin, promoting a healthy shine. A water based formulation with Glycerine and Tea Tree Oil.