[WORRY-FREE QUALITY] Our weekender backpack is made of sturdy, tearproof and water resistance canvas, breathable shoulder straps, padded foam pads, adjustable chest straps, reinforced buckles all around, and more sturdy shoulder straps at the link between the bag body, Makes the carry on backpack more comfortable and durable, designed for travel, camping, weekends. If you have any questions, please feel free to contact us, we will give you a satisfactory solution within 24 hours. [FOR TRAVEL] This carry on backpack is flight approved, you can travel anywhere you want, it has a side handle, it can be turned into a suitcase backpack, and there is a luggage strap on the back, which can be placed on the luggage, it's very convenient to carry. Breathable sponge mesh design on the backside and shoulder straps help for the air convection, ventilation, and heat elimination and help relieve the stress from your shoulder. It’s a nice personal item backpack. [EXTRA 4 PACKING CUBES] Travel backpack with four packing cubes. large cube for sweaters, jackets, pants. Medium cube for shirts, shorts. Small cube for toiletries such as makeup, cleanser, etc, there's also a shoe pocket. Keeping your belongings neater and more organized. without a doubt it’s a large travel backpack. If your clothes get wet, don't worry, there is a wet pocket at the top of the large compartment, which can hold 2 T-shirts or towels. [AIRLINE APPROVED] Weight: about 4 lbs. This carry on backpack the size before expansion is 20*14*7 Inces, and the size after expansion is 20*14*9 Inces, which conforms to the size (22*14*9 Inces ) regulations of most airlines for carry on baggage, such as Delta Air Lines, Alaska Airlines, Southwest Airlines, United Airlines. It’s a carry on backpack airline approved and 180-degree zipper closure to get you through security quickly. [LARGECAPACITY EXPANDABLE ]40L travel backpack expandable, can hold the necessary items for 3~7 days of travel, can accommodate three or four sets of clothes, shoes(Comes with a separate shoe bag), and Other daily necessities. The computer compartment can hold a 17-inch laptop. The capacity before expansion is about 32L, and it is 40+L after expansion. It is an ideal travel backpack for men and women.