Lash cosmetic is a term used to describe products that are designed to enhance the appearance of eyelashes. The most common lash cosmetic is MASCARA, which is a product that is applied to the eyelashes to make them appear longer, thicker, and darker. MASCARA typically comes in a tube with a wand applicator, and it is applied by brushing the wand through the lashes. MASCARA can also be used to create dramatic looks, such as smoky eyes or cat eyes.