The name says it all ... BODY in a bottle. BODY.MASS is based on the technology to make lashes longer and thicker, giving you volume and thickness that gives you body and bounce. Our leave-in plumping treatment is a rich formula with oleanolic acid that strengthens the hair at the roots and strengthens and prevents aging of the hair. Use this spray every day for 3 weeks in a spa form and you will immediately notice a difference.