The puressentiel lice repellent spray possesses a preventive action against lice. In the event of an outbreak, it prevents scalp infestation and offers effective protection for up to 24 hours. No neurotoxic insecticides. 100 percent Natural active ingredients head lice repellent spray. Gentle formulation, free from synthetic fragrances and pesticides. Derived from lemon eucalyptus oil with no neurotoxic insecticides.