Jane Iredale PureLash 0.3 oz (9 g) Lash Extender and Conditioner is a volume-boosting length-enhancing eyelash serum, extender and conditioner. Is it great for everyday use on its own as a lash treatment or as a base for your favorite mascara to make it twice as effective. 
Prior to applying mascara, use this conditioner to help strengthen, lengthen, and thicken your lashes. This will increase the potency of the mascara by half.