N-Proof/Long Lasting: N-Proof (waterproof, smudge proof, sweat proof, oil proof), enhances durability and consistency all day. 24-hour of perfect consistency with fast adherence feature onto the skin as soon as you put on the liner. A new challenge to life-proof liners. Clear and sharp eyes for the whole day. One Liner, Two Effects: Thick: Vivid towards the beginning of your eyelid & Thin: Sharp for your wing. Easily and quickly, complete an attractive eye-line with a dual liner for the eye look that you desire. Life-proof dual shot liner that will make your liner routine much easier. Nylon material that replaced for the shortcomings of regular brushes and polyester material Features: Real smudge-proof means no smearing on the actual eyelid area.