Long-Lasting Wear. Enjoy long-lasting wear thanks to the non-smudge formula, making it perfect for daily use or special occasions. Ultra-Thin Dual-Ended Pencil. The ultra-thin dual-ended pencil allows for precise application, ensuring a natural look and defined eyebrows. Waterproof Formula. With its waterproof formula, this eyebrow enhancer stays put all day, resisting smudging and sweat. 3D Definition. The pencil's unique design provides 3D definition, giving your eyebrows a fuller, more voluminous appearance. Triangle Shape. The triangle shape of the pencil tip allows for easy application, reaching even the smallest hairs for a flawless finish.