This bag is 28L size. It is a good sized pack but not large. It is great for a travel carry on but small for an all-in-one that would replace a carry on backpack and a piece of luggage. I love the details from the zippers to the flexibility inside to the expansion zip out. The fabric is supple yet durable. The shoulder straps are curved for a more contoured fit - especially for women. I did also get the hip pack to couple it as a waste strap - it rides higher on the torso than I would like (I’m 5’9”) but it is a great combo and much better than trying to stuff the hip pack into the pack when you are flying with carryon limitations.