Clinique’s mistake-proof pen creates a clean line in one steady sweep. Tapered, precision brush paints on pure, deep colour from thin to thick. 24-hour smudge and budge-resistant wear. Ophthalmologist Tested. Allergy Tested. 100% Fragrance Free. HOW TO USE:- To create a thin line, use the pointed tip of the brush.- To create a thick line, use the flat side of the brush.- To create a tight line: While looking into a mirror, tilt head 10° back, making it easier to see the lash line. Starting at outer corner of eye, draw a line to the middle of the lashline. Repeat from inner corner of eye, connecting to the first line.- To create a cat eye: Start with the tight line as directed above. Create the perfect diagonal line for your eye shape by drawing a short thin line upward towards the outer corner of your eyebrow.