Benefit M Lice Free Spray is an anti-lice solution, extremely effective in eliminating lice and nits naturally, from the first application. property Its dual-action mechanism suffocates lice by blocking their airways, while simultaneously dehydrating them by dissolving the chitin in their shell. It protects for many hours with a conditioning and soothing action thanks to the provitamin B5 and allantoin it contains. With coconut oil. No chemical pesticides. No toxic biocides.