I have now purchased 6 - 30L bags as gifts after I purchased one for myself. I got this to use as my personal item on the plane. I then had an additional carryon. The pack holds so much, pair of shoes, book, water bottle, small purse & phone, best part---I used a medium size E-Bag packing cube full of clothes and it fits perfect in the back pack. along with all the other above items. A great packabe back pack.