• Binder with a refill of 100 squared A4 sheets (21x29.7 cm) with 5x5 mm grid and 90 gsm thickness, ideal to prevent ink bleed-through • Includes 4 colored dividers to organize documents by subjects or topics • 4-ring system that makes it easy to file and consult sheets, with an internal compressor to keep pages in place • Elastic closure that protects the contents inside the backpack • Expanded dimensions of 28x32x4 cm for greater capacity without losing manageability • Transparent inner pocket to store loose papers, notes, or small accessories • Durable materials: hard cardboard exterior and laminated finish for greater durability and resistance to daily use