Nettex Equine Advanced Fly Repellent is a powerful and long-lasting fly spray that easily deters flies and biting insects. This effective fly repellent has added moisturisers, conditioners and natural extracts that assist the longevity of the DEET-based formulation. Ideal for use where horses and ponies are kept in problem areas such as around ponds, streams and waterways that are heavily burdened with biting insects.