Kevin Murphy Body Mass is a professional-grade leave-in plumping treatment specifically formulated for fine, thinning, or flat hair. Inspired by advanced eyelash thickening technology, this innovative formula uses wild olive tree stem cells and biotin to visibly thicken each hair strand from the root. It helps fortify hair, enhance flexibility, and create an optimal scalp environment to promote healthy growth and reduce shedding. The lightweight, non-sticky treatment provides immediate volume and fullness while protecting and nourishing your hair.