40L Expandable Waterproof Travel Backpack with USB Port & 17 (43.18 cm) Laptop Sleeve AirVoyage | Ka-mostore

This 40-liter expandable backpack is engineered for travel, work, and study, delivering expandable storage, security features, and a padded laptop sleeve that fits devices up to 17 inches (43.18 cm). Constructed from water-resistant nylon with reinforced stitching, it is built for daily durability. The suitcase-style opening unfolds to 180 degrees, simplifying packing. When you need extra capacity, the design expands by 6 cm (about 2.4 inches) for additional room. Inside, you¡¯ll find 12 compartments, including a hidden anti-theft pocket and a padded laptop sleeve that accommodates laptops up to 17 inches (43.18 cm). A USB charging port allows on-the-go power for phones, tablets, and accessories while you travel. Security and comfort are designed into the details: an anti-theft back pocket with secure zippers, a trolley sleeve for luggage compatibility, ergonomic shoulder straps, breathable padding, and a chest buckle for stable, comfortable wear. Size and use notes: airline-approved carry-on dimensions with a 40 L base capacity (expandable by 2.4 in). Overall measurements are 19.3″ ¡Á 11.4″ ¡Á 7.5″ (49.02 cm ¡Á 28.96 cm ¡Á 19.05 cm). Laptop compatibility goes up to 17 inches (43.18 cm). Use cases include travel, business, college, and carry-on luggage.