NAF Off DEET Power is a super concentrated anti-fly and anti-insect repellent spray designed for year-round protection from a wide range of pests. Particularly effective during the summer months, NAF Off DEET Power provides lasting equine relief from these menaces, enabling your horse to relax and de-stress after eventing and travel. Contains 19.6% DEET. This award-winning formula offers powerful, long-lasting protection against flies and biting insects, made even more powerful with added fly repellents to support the well known action of DEET. Winner of the Horse & Rider Magazine 'Best in Test' 2016 award. Features: Long-lasting NAF DEET fly spray containing extra strong fly repelling ingredients that prolong the lasting effect. Strong deterrent against horse flies and midges. Water-based and ready for use. Ideal for horses that are sensitive to irritations caused by fly bites. Available in a handy spray. This potent fly repellent spray is a formidable force against those nuisance pests that bother horses in the summer months. Great for keeping your horse relaxed and focused.