Only 1 of two packs that fit. Love the design, it lends itself to modifications ie., cinch cord, across the back. The hip blet pockets are larger than most. Very rugged, except for one thing. The inside lining that covers the X frame, is thin. I had place a 3L camelback hydration bladder in the pouch, but the pouch is too small and really designed for 1.5L. While hicking the Grand Canyon and hiking the Havasu reservation, tears formed on both corners of the pouch. I sent it in, but they could not repair it, so TNF gave me my money back. I really loved the pack, the Large is excellent for people with a long back. Since they could not repair it, I ended up with the Deuter Aircontact Pro 70 + 15L. There are advantages with the Deuter the TNF does not have, like more pockets and U Shaped entry to the main compartment. I would of stayed with the TNF if they provided a stronger fabric that divides the pack from the frame. I put the pack thru a thorough beating and still looked like new. Only exception was the tear on the corners of the pouch. Too avoid the tearing just use a 1.5L hydration bladdler. The pack is highly adjustable and easy to mod out. 4 out of 5 stars because of the tear and could not be repaired. I thought of taking it back, and repair it with a sealant or use a cloth patch to seal and stop the tear, much like one does with dungarees.
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