The Nature Saver Professional Notebook NAT20205 is a hardcover, twin-wire bound notebook featuring 80 sheets of 22 lb. heavyweight recycled paper. This design allows for writing on both sides without show-through, with narrow-ruled pages (1/4" between lines) and margins for organization. The twin wire binding ensures the notebook lays flat for easier writing and reading. Each page is micro-perforated for convenient removal, making it a practical choice for both students and professionals.