Decent bags. They're kind of large for me though (didn't read well enough I suppose). I have a smaller 30L pack for backpacking, and can only fit 3 of the 4 as long as they're not packed completely full. Upon first use, the little zipper strings to one bag fell off completely. Never a nice thing to have to deal with when you're running late for a flight and your brand new travel cubes decide to be difficult, so I docked a star. Otherwise they're pretty sturdy, thin fabric, flexible, and water wicks off of them very well.