- Look professional, feel luxurious. Designed to fit into the crease of the eye and to result in a perfectly blended shadow. One of our thinnest brushes for use on the eyes, the crease brush builds dimension for a look that pops. Shaped like a small dome with a point. A soft, long, tapered eye shadow brush made of goat hair or naturon. Thinner than the Eye Contour brush, use when you want to make up the eye with more definition. Use for medium to deep colors in the crease of the eye. Please be aware that ingredient lists may change or vary from time to time. Please refer to the ingredient list on the product package you receive for the most up-to-date list of ingredients.