50HKD Features Waterproof. A 2-in-1 type that can be used as an eye color when blended. Oil-rich formula provides a smooth drawing experience. Characteristics of ingredients and prescription Waterproof with high adhesion and resistant to water, sweat, tears, and abrasion. Beauty moisturizing ingredients (hyaluronic acid, collagen, retinol (sodium hyaluronate, water-soluble collagen, Contains retinol palmitate). How To Use Carefully draw a line along the eyelash line. Don't try to draw all the way to the end at once; if you draw little by little, you'll end up with a beautiful finish. Be sure to close the cap and store it after use.