Helps strengthen and protect the nail while leaving a smooth finish. Wheat Protein enriches healthy nails for strength and elasticity. Protein Base Coat extends the duration of a manicure. The base coat for healthy, strong and flexible nails. Made in USA!. .5 oz. This item is not sold boxed. Essie Protein Base Coat strengthens and protects nails while leaving a smooth finish and helping to extend the duration of your manicure. Apply prior to nail color for best results.