I agree with the posts before this one. And I would reccomend the Camelbak Maximum Gear series. THey are made of cordura and are better constructed. I have had a couple and the one I have now is the Maximum Gear MULE. It has 100 oz of water in its Omega resevoir, which has a large opening. It big enough to get your hand into, and makes filling it out of streams easier. It also has tow large pockets (I dont know the cube) that can be used for holding all kinds of stuff, to include a full MRE (if you take it out of the bag), my PSK and FAK, plus extra batteries, socks, and my pancho. I replaced my ALICE gear with it for the field.

I hope this helps, I love mine and I recommend to everyone.

Garrett
_________________________
On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus