The Flip File Sketchbook 110gsm 90 Pages A4 features an innovative design combining a heavy-duty hardcover sketchbook with integrated, crystal-clear plastic display sleeves to protect your completed artwork. The premium 110gsm acid-free cartridge paper pages provide an exceptional smooth finish that is highly optimized for technical pen drawings, colored markers, and graphite sketch illustrations. Bound securely with a durable twin-wire spiral, this highly versatile presentation book allows art students and professional designers to draw, flip, and immediately showcase their portfolio projects in one seamless layout.