TerraShield® is an all-natural formula of lemon eucalyptus, citronella, lemongrass, and a proprietary blend of 12 other therapeutic-grade essential oils blended in a base of pure fractionated coconut oil. A primary function of essential oils in plants is protecting against insects and other predators. Unlike other products that contain synthetic and toxic chemicals, TerraShield is a natural approach to managing exposure to biting insects. TerraShield's fresh, light citrus smell is wonderfully invigorating and can be used safely by everyone in the family. One application provides coverage that lasts up to 6 hours.