WHAT IT IS A luxurious, fibre brush mascara that delivers buildable volume and length for a false-lash effect and supple lashes. WHAT IT DOES Achieve lashes that look defined, plusher and longer with YSL's legendary false lash effect mascara: Volume Effect Faux Cils. The non-drying formula is now enriched with pro-vitamin, walnut leaf extract, from YSLs Ourika garden in Morocco and Argan oil. The formula boosts your natural lash colour and leaves them looking thicker, it also prevents smudging, clumping or flaking; coating lashes from root to tip to build luscious volume. Prep your lashes with the Flash Primer from Yves Saint Laurent to condition lashes and leave them feeling nourished.