Asenlin Travel Backpack for Women Men，40L-50L Expandable Carry on Backpack，17 Inch Water Resistant Laptop Backpack for Weekender Overnight Extre Large Backpack-Black

【Expandable & Super Large Capacity】： This large travel backpack has an expandable design that gives you a larger capacity, 45L before expansion and up to about 55L after expansion. unzip for more storage space and you can easily fit 3-5 days of travel supplies.【Size and material】: Travel backpack size is 18.8 * 12.2 * 8.2 inches, and has a special pocket that can accommodate a 18.3 inch laptop. The backpack can be fixed on the trunk rod or can be carried by hand; it uses high-quality water-resistant polyester oxford cloth material and explosion-proof zippers.【Upgrade and Reinforcement】: This model has been upgraded many times. We use multiple materials for multiple tests to ensure superior. We strengthened the size of the fragile parts and adjusted the size of the center of gravity to make it easier to use for a long time, and refer to the actual experience of detailed design to optimize, reliable and ensure long-term use.【Ingenious Structure】: Main luggage bag + laptop special bag + front small bag + water bottle / umbrella bag mouth + hidden shoulder strap design + front panel night travel reflective seat belt.【Application】: Travel, carry around, weekend travel, cross-border travel, overnight, suitcase, convenient for you to compress into a smaller backpack without carrying luggage, into a smaller backpack. ideal for everyday use. High quality materials and excellent craftsmanship ensure long-lasting durability.