YSL The Shock Mascara. From the Shock Collection. WHAT IT IS: The most volumizing mascara by French luxury fashion house. The Shock coats each lash with maximum volume in just one stroke and without clumping. WHAT IT DOES: The hourglass shaped brush allows more of the exclusive shock formula to grab hold of lashes. With brilliant, high intensity color, this long wear mascara will give you dramatic lashes that don?t smudge. HOW TO USE: Start applying at the root of the lash on the outside of the eye. Touch the brush to the lash pushing upwards and outwards at the same time. T he Shock is buildable and you can pump up the volume by adding stroke on top of stroke