Enhance your natural lashes and brows with COVERGIRL s Lash Blast Lash & Brow Serum. This eyelash serum is clinically proven to help lashes appear up to 24% longer in just 30 days! The unique brush coats lashes and brows with conditioning gel serum from root to tip. The brow growth and lash volume serum is infused with bamboo extract biotin peptides and castor oil for thicker fuller and stronger lashes and brows. Best of all COVERGIRL products are Cruelty Free International meaning they are never tested on animals.