Thick and durable 25-pt. pressboard made from earth-wise 100% total recycled material Fasteners can hold stacks of paperwork securely inside the classification folders for instant flip-through. Office Depot classification file folders help you subdivide and identify various sections of your documentation. Dividers are made of kraft for amazing durability. Thick and durable pressboard cover. Tyvek tape spine expands to hold plenty of documents.