Ink Tank: Maintains the same clarity from the first use to its last use!. Easy Cleansing: Comes off cleanly with just warm water, no eye makeup remover. Long-lasting, without worries for smudging, smearing: Dries quickly to be smudge-proof, waterproof, and oil-proof. High-Elasticity Sharp Tip: Finish your eyeliner the way you want without the brush splitting. Certified Vegan by Biorius in Belgium.