4D Silk Fiber Mascara: The unique mascara brush with ten layers of bristles reveals layers of lashes for a sensational, full-fan effect. Adds the look of length and volume without clumping. Extra black formula: Enriched with ultra-small 0.079-inch fibers, the formula enhances and develops the appearance and volume of eyelashes, shaping, reshaping, and sculpting perfect lashes. Extra-long eyelashes: mascara, natural lengthening and thickening extension, say goodbye to spidery, flaky and unnatural-looking eyelashes, hello to dark, rich, voluminous and lengthened eyelashes.