Bye-fly is a broad spectrum insect repellent that contains IR3535 as an active ingredient. This revolutionary molecule has been available in Europe for more than 10 years and demonstrates excellent repellent efficacy. It is nature inspired with an outstanding safety profile, is non-toxic and environmentally friendly. Due to its repellent action it does not cause resistance as found in traditional fly sprays. It has been proven effective against mosquitos, stable flies, horse flies, ticks and lice. It has been formulated to be virtually odourless yet still effective.