DEET-Free Protection Enjoy up to six hours of DEET-free protection from mosquitoes, deer ticks and other biting insects with Repel Plant-Based Lemon Eucalyptus Insect Repellent. The active ingredient in Repel is oil of lemon eucalyptus, a plant-based oil derived from the leaves of the Eucalyptus citriodora tree. The oil--which offers natural repellent properties against biting insects--is safe and effective, with a cool, refreshing scent. Lemon Eucalyptus vs. DEET Oil of lemon eucalyptus is the only plant-based active ingredient recommended by the Centers for Disease Control and Prevention (CDC) for mosquito protection. Oil of lemon eucalyptus provides protection similar to lower concentrations of DEET. It works great for outdoor outings, but should not be substituted for DEET-based products if you're traveling in severe insect conditions where Nest Nile virus or malaria may be prevalent. Application Recommendations Use just enough repellent to cover all exposed skin and clothing, spreading evenly with your hand to moisten. To apply to the face, spray it in your hand and then spread it to your face and neck. When applying to children, do not use Repel Plant-Based Lemon Eucalyptus Insect Repellent on their hands to prevent the accidental spread of repellent to their eyes or mouth. Oil of lemon eucalyptus-based repellent products are safe for children ages 3 years and older. Reapply once per day as needed. Oil of lemon eucalyptus can be used on clothing and will not harm synthetic fabrics or gear made from synthetic materials. This product is designed for humans only, not pets.