PREVENTIVE ANTI-LICE SPRAY ° Without neurotoxic chemical agents ° Proven effectiveness for 24 hours ° Without propellant gas ° Tested under dermatological control ° Pleasant fragrance ° Does not dry or grease hair, does not stain ° Dries immediately PROVEN EFFECTIVENESS: TESTED BY THE LABORATORY OF ECTOPARASITES - INSECTICIDES - UNIVERSITY OF TOURS (FRANCE) LICE REPELLENT ACTIVITY: Tests conducted with the Puressentiel® SOS Lice Spray formula, on a total of 495 lice (tests repeated 5 times) at different stages of evolution. => The Spray has a repellent effectiveness of 24 hours after application of the product. Click here to read the technical data sheets