Upgraded Japanese formula, imported Japanese raw materials, pen refills containing natural vegetable oil, skin friendly and non irritating, easy to remove makeup without residue. By adding a hard refill, t he strokes are smoother and the color is better, making it easy to outline the distinct wild eyebrows and misty eyebrows. While waterproof and sweat resistant, it also has embroidered grade anti hemp quality, making the painted eyebrows long-lasting and non tingling.