The e.l.f. Black Waterproof Eyeliner Pen is a sleek and precise makeup tool designed to achieve smooth and defined lines on the eyelid. With a semi-matte finish and a smudge-proof formulation, this pen liner is ideal for adult users looking to add a bold and dramatic look to their eyes. The single black shade and package quantity of 1 make it a versatile and convenient product for everyday use. The pen formulation and English language packaging ensure ease of application and instructions for a flawless eye makeup look.