What it is: A nail-polish base that can be applied before your polish to ensure optimal wear.What it does: The nail base coat helps you prepare for polish application and optimize its wear. Dior has created the Base Vernis Coat to help strengthen and harden nails. Its smooth finish ensures a perfect manicured finish. How to use: Apply the base coat before applying your nail polish to optimize manicure results. 0.3 oz. Made in France