Yamamoto Paper fountain pen friendly A5 plain notebook. Cosmo Note is sewn in sections along the spine for a sturdy finish, and when open it lays completely flat for enjoyable writing experience. The notebook has plain pages, and comes with 6 mm squared /12 mm lined guide sheet.
Cosmo Air Light is The Best Paper of 2019 "Find Your Fountain Pen Friendly Paper" organized by YAMAMOTO PAPER in San Francisco Pen Show. This paper is excellent at fountain pen ink shading and sheening.