Extreme, rebellious volume lasts up to 24 hours; lash tint technology gradually darkens lashes in 7 days with natural dyes Volumizing: 84% of people in our study saw lashes volumized Lash tint: 94% of people in our study saw lashes darkened The curvy big side of the Revlon double-sided brush adds volume, and the flat bad side fans out lashes for a panoramic effect No-clump, smudge-proof, flake-proof formula available in washable and waterproof