What it is: A dual-ended ink stain and waterproof eyebrow pencil that fills and defines brows with microblade precision for up to 24 hours. Ingredient Callouts: Free of sulfates SLS and SLES, parabens, and phthalates. This product is also cruelty-free.What Else You Need to Know: The waterproof brow pencil shapes, shades, and fills in sparse brows while the brow pen's brush tip + ink stain mimics thin, hair-like strokes to add depth and dimension for a mircroblade effect. Brow Blade wears evenly with smooth application, and is resistant to sweating, smudging, and fading.