The present invention relates to a leave -in conditioner composition in form of water in oil emulsion, particularly water in silicone oil emulsion for keratin fibres especially human hair. The present inventors have surprisingly found out a water in oil emulsion, in particular a water in silicone oil emulsion comprising volatile silicone oil, water in oil emulsifier and an internal water phase comprising synthetic mica coated with metal oxide or oxides and having a volume particle size distribution in the range of 1 to 750 µm conditions hair excellently and improves hair shine dramatically and gives hair smoothness and elasticity.
