Don't Fake It Flex It. Revlon ColorStay Flex Wear Full Cover⢠Concealer features Adapti-Flex Technology for a 100% full-coverage finish that's comfortable breathable and transfer-resistant. nourish skin as it conceals imperfectionsâfrom redness to undereye circles for up to 24HRS. Non-creasing. Non-drying feel. Non-fading.