What a great product! I did a practice pack and found that by carefully rolling and layering I can fit two weeks worth of clothing and everything else in two large, three small cubes. These then fit into my underseat bag, how amazing! I don't carry a hair dryer, laptop or camera so there is more than enough room. My next trip will be so easy and I cant wait to get underway. By the way, the eBags cubes appear to be top quality with sturdy zippers, I belive they will wear well.