This Prostand set provides a practical way to keep 11th-grade Russian school textbooks in good condition throughout the academic year. The kit includes ten transparent covers made from polyethylene, which shield your manuals from common classroom hazards like dirt, moisture, and general wear. You will find two different sizes in the pack to accommodate various book dimensions: five covers measuring 246x425 mm and another five at 245x357 mm. These clear sleeves allow you to see the original cover art while ensuring the pages remain clean during daily transport in a backpack.