Gnitzen Black Mosquito Repellent Double (125ml) For many people, spring is the best time of the year. Just not for horse owners! Because when the days get warmer again, black flies and midges also reappear and torment our horses with their bites. The period of open wounds and eczema begins and therefore also the time of gnitzen black flies repellent double. But with the right remedy, you can keep the little beasts away. Anti black flies, gnitze is a very effective product for repelling black flies and midges. Due to the special composition of the ingredients, the pheromones (messenger substances) they contain are continuously released via our CSS (Controlled Supply System). Due to the high yield, an economical application is sufficient to protect your horse for up to 24 hours. Gnitze black flies repellent Double works specifically on black flies and midges.