Expandable Capacity: The backpack measures 30*18*46cm / 11.8*7.1*18.1 inches, its width can be extended from 18cm to 28cm, providing enough space to carry more items when needed. Designed with multiple pockets, including a large main compartment with internal pockets, an independent laptop compartment, a side pocket and 3 front pockets. Waterproof Fabric: Made of high density water-repellent leather film fabric, the men’s backpack can effectively prevent items inside the bag from getting wet in rainy weather. Its smooth zippers, sturdy buckles and reinforced stitching give the backpack an upgrade in durability, allowing it to be used for a long time. Easy to Carry: Designed with soft and breathable shoulder straps and back pad to relieve pressure and dissipate heat for comfortable carrying. On the back of the backpack there is a luggage strap that can attach the backpack on the handle of the suitcase for easy carrying, convenient for travel and outings. Versatile Uses: The backpack is multifunctional and practical, ideal for various occasions such as work, commute, travel, college or outdoor activities, perfect to use as a work backpack, college backpack, casual daypack, travel backpack, laptop backpack etc, bring great convenience for your daily life. After-sales Service: We are committed to each customer to provide dedicated service, and bear the responsibility of each product quality. Our goal is to win the customer's satisfaction with the best products and services. If you have any questions or suggestions, please contact us and we will reply as soon as possible.