Enhance the look of your natural lashes with christian breton eye lash builder a primer and serum specially formulated to help lengthen and thicken the appearance of your eyelashes promoting noticeably thicker intensified lashes the formula features a spoolie applicator for easy use apply in the day to prime lashes and protect against the drying effects of mascara and use overnight as a serum to promote healthier stronger longer lashes enhancing volume and thickness it will promote lu