Collistar Top Coat Gel Effect & Volume + Art Pen - Two products in a single package for a truly professional nail treatment at home! TOP COAT gel effect & volume: gives shine and an incredible volume effect thanks to its extraordinary gel formula. It can be used alone for a "mirror effect" transparency or on top of the enamel to increase the brilliance and color resistance. ART PEN nail decoration: perfect for creating imaginative decorations with a few simple gestures or an elegant French on hands and feet. It is used before the Top Coat both on clean nails and on dry nail polish.