Bell Hypoallergenic Lash Booster Pen a combination of an eyeliner with a delicate eyelash strengthening serum. Its intense pigmentation creates a dramatic black effect with just one layer. Its long-lasting, waterproof formula prevents smudging throughout the day. The special applicator helps create different make-up looks a precise thicker or more vivid line. When applied every day, it supports eyelash growth, and increases their length and volume. Suitable for people with sensitive eyes and those who wear contact lenses. Tested under supervision of a dermatologist and ophthalmologist.