Pentel Calme Ballpoint Pen was designed to be a clickable pen with one of the quietest and unobtrusive knock mechanisms. When compared to most other clickable pens, the Calme pen is 66% quieter. The design of these pens are meant to be calming as well. Available in matte neutral colors for the most part, pens in the Calme collection come with a rubber grip section with a satisfyingly textured and almost leather-like surface and an equal diameter as the rest of the pen, allowing the grip section to seamlessly align with the rest of the pen.