Sally Hansen Double Duty Base and Top Coat features a Panthenol formula that smooths nail surfaces and enhances color adhesion. Acting as both a base and top coat, it protects and strengthens nails with Nylon and Pro-Vitamin B5 for a durable, chip-resistant finish. To use, shake gently, apply as a base coat on clean, dry nails, let dry, then apply 1-2 coats of nail color, and finish with Double Duty as a shiny top coat for stronger, flawless manicures that last.