This Prostand set provides ten transparent protective covers specifically designed for 10th-grade Russian school textbooks. Made from durable polyethylene, these sleeves shield books from wear and dirt while keeping the original covers visible. The kit includes two different sizes to accommodate various book dimensions: five covers measuring 262x425 mm and five measuring 245x357 mm. This variety ensures that students can properly wrap both larger and smaller textbooks, helping them maintain a neat appearance throughout the school year.