Premium Quality No Bleed Paper All ruled divider-subject notebooks use superior quality, bright, 80 GSM paper, allowing you to use various pens without bleeding, ghosting, or leaking through to the other side. Durable Twin Binding Hard-backed with beautiful finishes and every page lined and margined, these sturdy, stylish notebooks include durable twin binding and are fantastic for organizing work projects, taking school notes, or college coursework. Removable Dividers Perfect for students or professionals, all 5-subject notebooks include bright tabs, repositionable, color-coded dividers with long-lasting interior pockets, and polypropylene back and front covers.