Description 1. Dual-Brush Innovation for Precision Our hairline pen features an innovative dual-brush design to revolutionize your root touch-up routine. Use the wider brush to fill in larger sparse areas, while the fine-tooth comb end enables meticulous detailing for a perfectly defined hairline and natural-looking hair flow. 2. Waterproof and Sweatproof Formula Confront humidity, workouts, and rain confidently! This hairline shadow pen is formulated to be exceptionally waterproof and sweatproof, ensuring your meticulous styling stays put from morning till night without smudging, fading, or transferring, regardless of your activities. 3. Instantly Coverage and Volume Effortlessly conceal receding hairlines, widening parts, sparse patches, and even gray hairs in seconds. This multi-purpose tool provides instant, realistic coverage and the appearance of increased hair density, leaving you with a voluminous look that looks incredibly natural and non-greasy. 4. Universal Applicability for Hair & Beard This versatile pen is a grooming essential for both men and women. It is perfect for filling in thinning edges on the scalp and precisely shaping, defining, or filling in sparse areas of the beard for a fuller, well-groomed, and realistic appearance. 5. Material and Size Specs: The outer casing is crafted from quality materials, and the pen is filled with a fine-textured, long-lasting formula with a net weight of 3ml / 0.1fl.oz. The precise pen size is 1.4cm (0.55") in diameter and 11cm (4.33") in height, making it portable and easy to use. Package list 1x Hairline Pen