Patagonia Endurance Pack - 750 cu in

I've been using this for longer trail runs (anything over 2 hours when I can't use two water bottles), and it works well. No bouncing or chafing, and I haven't run out of water yet. It does feel a little overbuilt, as one review said, with a lot of dangling straps that I have to tuck away to make sure they don't bounce around. The pockets on the waist strap are handy for holding gels and salt tablets, though. Overall, I'm happy with it, although for strictly trail running (my only use so far) it's probably more than you need.

I had a larger version of one of these- the catalyst and it was surprisingly roomy for its size. Its also surprisingly water resistant, I went though a few rainstorms here in santa cruz with the thing on my back and all my gear stayed dry. on the downside I didnt like the fact that the pack rode the hips more than the shoulders and the fact that it tapers at the top thus not allowing as much access to the bottom. other than that it is very well made. Id have kept it but im a bit of a mil- spec gear whore since I do many times carry a machete and/or rifle along with other odd shaped loads- bottom line I needed something with more attatchement points for gear. Abrasion resistance is second to none

This pack is very well built, as you would expect from Patagonia. It's comfortable and stable. The hydration sleeve and hose exits are well designed. I use a 3L platypus big zip in the pocket and it fits perfectly. With the hydration bladder, there is a lot less room in the body of the pack, but you can still jam in a light shell and midweight layer. The biggest drawback of the pack is access: even with the zippers fully open, the opening is pretty constricted. It's a little difficult both to jam stuff down into the bottom and to rummage around in the bottom finding things. Overall, though, a good pack for warmer months.

Very well made pack. Sits nice on the back (not too high). Little heavy (somewhat over built).