The W7 Absolute Lash & Brow Serum is a dual-action formula designed to nourish and rejuvenate lash and brow hairs. The fine-tipped brush is perfect for applying the serum along the lash line gently, whilst the thicker, barrel-shaped brush can be used to groom and comb the brow hairs. This daily treatment is enriched with Vitamin B5 which helps to facilitate the growth of thicker, fuller lashes and healthier-looking brows.