DEET FREE. Our Insect Repellent - Expedition Sensitive Spray range contains the active ingredient Saltidin which is proven to repel mosquitoes, midges, horseflies, sand flies, gnats and ticks. The 20% Saltidin based formulation offers medium-high level protection against biting insects for up to 8 hours, and is more suited for sensitive skin than DEET-based repellents. A DEET-free repellent suitable for children over 2 years and use on sensitive skin. Suitable for family use and by pregnant women.