Lekeinchi Rolltop Backpack Waterproof for Women & Men, Large Laptop Backpack with Computer Compartment for 17 Inch Laptop, Stylish Travel Daypack for Travel, Cycling, University School--Black

"FLEXIBLE STORAGE SPACE: Normal size: 26 * 16 * 42 cm, extended size: 26 * 16 * 56 cm. The rolltop design makes this bag very adaptable (18 liters to 25 liters) and can be adjusted to your space needs. The spacious main compartment with padded laptop pocket provides space for a 17" laptop, change of clothes, books, water bottle, and more. PRACTICAL: The expandable travel backpack has a zipper opening on the back for quick access to your belongings. Reflective straps ensure safety at night and can also be used to hang sunglasses. WATERPROOF AND DURABLE: This laptop backpack is lightweight and durable, made of waterproof and tear-resistant matte polyurethane fabric on the outside and waterproof lining on the inside, suitable for long-term outdoor activities. All stress points are reinforced for durability. Comfortable to Carry: The back and wide shoulder straps of this stylish travel bag are made of breathable mesh fabric and well-padded to ensure maximum comfort on the back and less burden on the shoulders. Even when carrying heavy loads, this travel backpack is easy to carry. VERSATILE: This rolltop backpack is both stylish and practical, perfect for work, cycling, camping, traveling, weekend trips, or studying. It is a perfect gift for ladies and gentlemen."