ZIG LETTER PEN COCOIRO / KuretakeA pen that bends the rulesliterally. The ZIG Letter Pen COCOIRO offers a refreshing writing experience with its uniquely flexible tip, delivering smooth, springy strokes that combine the best of brush pen dynamics and everyday usability. With its newly improved nib, the COCOIRO writes more fluidly than ever, offering greater control and soft touch. Key Features Flexible tip design: Offers a springy, expressive writing feel unlike standard pens.