UnderSense 3-in-1 Maximizing Lash Primer works to (1) condition, (2) lengthen, and (3) volumize lashes. This lash primer improves the look and feel of lashes, while immediately boosting the volume, definition, and length of lashes before mascara application. Capixyl: Helps provide fuller, healthier-looking lashes. Jojoba Ester: Conditioning agent that nourishes and cares for lashes.