Solid pack. I like it because its simple and strong. It has plenty of storage space for the basic essentials, which is all I need. books, sandals, layers, water, swimsuit, sunglasses, keys, wallet, nylon hammock, and more. Highly water resistant. Bottom of pack sloped up to keep the load close to your back. drawstring closure works good too. It is a floppy bag because it is all just thin (strong) nylon. The thing I might add is compression straps, so the load doesnt bounce when you run. Great bag.