This is pack is really nice. It has a 3L/100oz bladder. I really like the hose, mouthpiece, and magnet thingy to hold hose. It is a relatively small pack. In addition to the bladder pocket, there was a small top pocket which is big enough for phone and keys and couple energy bars. The main pocket is about an inch to two inches deep and holds a pump, 2 tubes, and most everything else in your toolkit. It has a stretchy pocket on the front to hold your jacket and little device to hold your helmet on it too. It also has a couple pockets on the waistbelt. I like smaller bags, so this one is just perfect. It is great for a 3 to 5 hour ride, but probably a little small for a full day pack.