Hybrid tinting without the chemicals. - lasts 4-6 weeks on hair, 1-2 weeks on the skin. RefectoCil Sensitive is the first eyelash and eyebrow tint based on plant extracts, no burning, no irritations. Application in 2 steps and 3 minutes. The RefectoCil Sensitive Tinting System is completely different from the regular RefectoCil Tints, the ranges must not be mixed!