Jungle formula roll on with oil from lemon eucalyptus trees for controlled a natural protection the insect repellent factor is a quick and easy way to choose what repellent you need to protect yourself from mosquitoes midges and other biting insects the higher the irf the better the protection also available in sensitive skin irf2 medium irf3 and maximum irf4 up to 8 hours natural protection for use in countries with no known risk of malaria or other insect transmitted diseases