Lenovo B515 Water-Repellent Rucksack with Anti-Theft Compartment for 15.6-Inch Laptops: Black Lenovo 15.6-Inch Laptop Daily Backpack Built for the daily grind, the Lenovo 15.6" Laptop Everyday Backpack is composed of premium materials that are both water-repellent and tear-resistant. Its main compartment is roomy enough to accommodate personal belongings for laptops up to 15.6".