Our strongest insect repellent. The Expedition 100+ range contains a dual action formula which combines natural pyrethroids with DEET to provide the maximum level of protection against biting insects in all environments. The natural pyrethroids act as a bite inhibitor, discouraging actual biting. Each application of Expedition 100+ will last for over 10 hours. Re-application may be required in areas with high temperature and humidity. Repels: Mosquitoes, midges, horseflies, sandflies, gnats, fleas, ticks and other biting insects. Use for: Jungle treks, long haul trips and high risk malarial areas.