Shine Define Leave-In Conditioner intensively enhances your hair shine by improveing the light reflected by smoothing the hair's surface enhancing overall shine. Hair will be left feeling noticeably better and easier to comb. For lighter shades used in combination with Shine Define Mask hair density is optimised in addition to smoothing the hair's surface for maximum shine.Dull hair is often the cause of rough brittle hair. Wella's System Professional Shine Define Line enhances shine with it's exclusive Tri-complex. Tri-complex consists of:Citric & Lactic acid - have an astrigent effect on the inside of the hair to achieve optimum hair densityPanthenol - a big moisturiser for hair protects the hair long term on drying outBehentrimonium-Chloride - balkances hair structure to generate smoothnessPearl Extract - support maximum shineHow to Use:Apply to towel dried hair do not rinse out.Lighter Shades - Apply to towel dried hair then apply Shine Define Mask directly over and leave on hair for 5-10 minutes. Rinse throughly.