CND VINYLUX™ is a breakthrough polish system that endures a week of fashion perfection…without a base coat! Exposure to natural light secures the patent-pending technology, creating an enduring, long-lasting polish. While ordinary polishes become brittle and deteriorate over time, CND VINYLUX dries naturally to a flawless finish and strengthens its resistance to chips over time. CND Vinylux Weekly Top Coat has innovative Pro-light technology with photo initiators and becomes more durable with exposure to natural light.