I use this bag for everything....I use it for work, gym and all my little errands. I can load a set of workout clothes, shoes, gallon jug of water, pistol, duty belt, ballcap, hand held radio, and a jacket with room to spare. but it is small enough not to look to retarded on the back of my bike.. I love this little bag...
Not as roomy as it looks due to internal frame. Mounts like a fixture to my rack due to 4 snap buckles and two bungees which are attached (but not mentioned in the specs).
Tail bag was purchased to transport laptop back and forth the work. One way trip is 30 city miles. Bag is stable when loaded.
Several straps, pieces, inside bag that I'm not really sure how they're supposed to be used. No instructions included.