Asenlin 40L-50L Travel Backpack for Women Men，18 Inch Laptop Backpack Flight Approved Luggage Carry On Water Resistant Backpack for Overnight Large Daypack-Blue

【Expandable & Super Large Capacity】： This large Shuttle backpack has an expandable design that will give you a larger capacity, 45L before expansion and up to about 55L after expansion. unzip for more storage space and you’ll easily fit 3-5 days of Shuttle supplies.
【Size and material】: Shuttle 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 will also be fixed on the trunk rod or will also 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 a couple of materials for a couple of tests to make sure top quality. 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 very long time, and refer to the actual experience of detailed design to optimize, reliable and make sure 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 Shuttle reflective seat belt.
【Application】: Shuttle, carry around, weekend Shuttle, cross-border Shuttle, overnight, suitcase, convenient so that you can compress into a smaller backpack without carrying luggage, into a smaller backpack.