* it’s important to note that with a brow pen such as this you must clean the brush tip regularly to ensure product flows efficiently. Please see full care instructions below Brow Boost features a precision-engineered multi stroke tip, developed with macro-lens technology. In one effortless sweep, it creates hyper-realistic, featherlight hair strokes, replicating the natural look of real brow hairs — instantly and seamlessly. The Next Generation of Brow Technology Unlike traditional brow pens, Brow Boost Multi-Stroke Marker was built specifically for sparse or hairless areas. The breakthrough triple-tip design delivers multiple fine lines at once, without skipping or bleeding. The result? A natural-looking brow, even where there is no hair to anchor pigment. Key features include: 18-hour wear with a smudge-proof formula Waterproof Post-chemotherapy and post-partum safe Available in three flexible, stretchable shades designed to adapt to multiple tones Mimics natural hair for a microblading-like effect without the commitment Ideal for use through the hair line / patchy beard