The Inart A4 Spiral Bound Sketchbook with 80 Sheets (1550399051) has a spiral binding, which allows the pad to be fully opened horizontally and the sheets folded back, making it easier to draw while standing, on your knee, or in tighter spaces where a traditional hard cover would be less practical. The 80 sheets of 110g paper, made of 100% acid-free cellulose, are suitable for dry techniques such as graphite, charcoal, and colored pencils, maintaining good adhesion to the line without the graphite sliding too much on the surface. The large number of sheets per pad makes it an economical option for those who draw regularly and need to renew the pad less frequently, avoiding changing diaries every few weeks. It is suitable for drawing students and amateur artists who value the practicality of the spiral binding in their daily sketching, whether in the studio, in art classes, or outdoor drawing sessions.