- Great lash waterproof thickening mascara- The waterproof formula is long-lasting and smudge-proof.- Precise Lash Building BrushThe Precise Lash Building Brush allows you to get the result you want, allowing the lashes to go from everyday to dramatic in just a few strokes for clean separate finish without the clumps.- Conditions as it thickens.• Formula glides on smoothly to build great-looking lashes.• Lash building formula makes lashes look fuller. No clumps.• Ophthalmologically tested.• Suitable for contact lens wearers.