Jane Iredale Dual Eyeliner & Brow Brush is a double-ended brush that makes lining & smudging so easy. One end is made from Toray nylon to give the stiffest bristles & maximum control & a sponge tip on the other. Use with the Cream to Powder Liners & also to shape eyebrows with shadow. The sponge tip will not only smudge liners but will also apply shadow in hard to reach places. What are the benefits? Made from Toray nylon to give the stiffest bristles & maximum control Use with the Cream to Powder Liners & to shape eyebrows with shadow Use the sponge tip to smudge the eye line When should I use it? To apply the Cream to Powder Liners & to shape eyebrows with eye shadow. How do I get the best results? New brushes should always be cleaned prior to use. This will remove any chemical residue left behind from the sanitising process, & prevent any possible sensitivity. New brushes often shed. Do not be alarmed this is normal & will reduce after a few cleaning processes. Clean brushes regularly with a mild shampoo or liquid soap, do not leave to soak as this will affect the ferrule & wooden handle. Rinse thoroughly & squeeze excess water out of the brush in the direction of the tip. Do not leave to dry in an upright position as water will run down into the ferrule causing damage & the brush will lose it original shape. Dry flat on a towel, if possible leave the head of the brush over the edge of a counter so that air can circulate evenly during drying.