The Prostand book cover set is designed specifically to protect Russian school textbooks for 6th grade students. Made from transparent polypropylene, these covers shield your books from dirt, moisture, and general wear, ensuring the materials stay clean throughout the school year. This package includes eight covers in two different sizes to fit various book dimensions. You will find four covers measuring 262 x 425 mm and another four at 245 x 357 mm. Because of the material's properties, it is important to keep these covers away from open flames.