Canson Sketch Books capture and preserve artwork, thoughts, and memories. The pads are constructed with durable double wire, and the sheets are the micro-perforated and true size. Sketch Books are great for perfecting your artistic skills and providing inspiration. These book feature quality, acid-free papers for the artist that appreciates the feel and performance of fine paper. Canson Field Sketch Books contain high-quality sketch paper with a versatile surface for a variety of dry media. The paper has a fine texture, tooth and has good erasability, and is smudge resistant. The high-quality heavy gauge double wire bound construction and attention to detail make these books timeless essential to any artist. Double Wire bound or Hard Bound Acid-Free Weight / Thickness: 65lb/96g For use with: Pencil and Charcoal.