• Binder with a refill of 100 squared A4 sheets (5x5 mm), refill format to easily add or remove sheets. • 90 gsm sheets, prevent ink bleed-through and offer greater durability. • Includes 4 colored dividers to organize documents by topics or subjects. • 4-ring system and internal compressor to keep sheets organized and secure. • Elastic closure that protects the contents inside the backpack. • Expanded dimensions (28x32x4 cm) for greater capacity without losing manageability. • Transparent inner pocket to store loose papers, notes, or small accessories. • Made of hard cardboard with a laminated finish, sturdy and resistant to daily use.