[Large & Expandable ] The capacity before expansion is about 32L,after expansion to 40L, can hold the necessary items for 3~7 days of travel, include three or four sets of clothes, shoes, and Other daily necessities, an ideal travel backpack for men women 
[Gifted 3 Packing Cubes & Shoes Bag] 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 bag. Keeping your belongings more organized
[Airline Approved Size] Weight: about 4 lb., backpack size before expansion is 20”*14”*7”, after expansion is 20”*14”*9”, which conforms to the size regulations of most airlines for carry on luggage, such as Delta Air Lines, Alaska Airlines, Southwest Airlines, United Airlines,180-degree zipper closure to get you through security quickly
[Wet Pocket Design] If your clothes get wet on the road, or want to carry on wet items, don't worry, there is a wet pocket at the top of the large compartment, which can hold 2 T-shirts or towels