The only Oil-Powered Ammonia-Free Permanent home haircolour. Olia Visibly Improves Hair Quality Colour After Colour. 100-Percent Grey Coverage.Revolutionary Technology:Unlike traditional haircolour, Olia uses 60-Percent oil blend with natural flower oils in the colorant. Olia achieves maximum colour performance while visibly improving the quality of hair. Visibly Improves Hair Quality Colour After Colour:Olia visibly Improves the quality of the hair as the oils help to reserve roughness and dullness for more brilliant, dimensional colour and softer, shinier hair with bounce.Maximum Color Performance:The unique oil-based formula maximizes the colouring process to achieve permanent colour results. It propels colorants deep into the hair, without ammonia, for pure, vivid, long-lasting colour.