correct, Conceal, transform. This skin-perfecting duo helps to custom correct dark circles, moles, redness, and more. Each Duo has two levels of coverage. At one extreme, there’s a light, luminous, wears-all-day formula with applicator brush to sweep into larger areas. At the other extreme, it has a concentrated full-coverage HYDRATING with a sponge tip to cover specific areas for up to 24 hours.