Keeping your horse healthy and comfortable can be a challenge when the flies and midges are about. That is why we have developed a range of solutions. Fly Repellent Gel Extra Strength contains the very effective 15% Ethyl Butylacety-laminopropionate (3535), it really is the ultimate fly repellent. Fly Repellent contains essential oils from six different sources, making it very effective. For those looking for something stronger, Extra Strength Fly Repellent was developed for export to those parts of the world where bugs have definitely “gone large”. It has a comprehensive formulation to help repel biting flies, midges, mosquitoes and other flying insects.