Looks like this pack will be hitting stores soon. I'll be testing this pack extensively over the next ~5+ months, and along with another long established UL frameless pack from major manufacturer doing a review which will discuss in depth not only the features and load carrying ability of each pack, but why each pack has the load carrying ability and characteristics is does. Which aspect(s) of each pack fails first when loaded beyond capacity, things like that.
The jury will be out on that for months, so what follows is the basic numbers and some descriptive photos to better guide any potential early adopters.
First weight. My size large is 1 lb 15.4 oz for the pack, and a further 12.8 oz for the folding foam pad which comes stock.
The pack is between 10 and 11" wide, around 8" deep, and 37" from the bottom of the backpad to the top of the roll top.
Torso length. The issue of proper torso length, with and without load lifters, will be addressed in depth in the article. There's a little more than an inch of up-down adjustment with the velcro hipbelt attachment, under the lumbar pad.
The lumber pad is a thinish bit of dense foam atop a piece of plastic sheet. The upper back pad is thick 3D mesh over a corrugated plastic sheet.
The stock foam pad is a pragmatic 20" by 48".
The joints are cut down and sewn to facilitate low-profile folding. It's a very dense, rubbery closed cell foam, which explains the hefty weight for the thickness.
Fortunately you can fold it so the creepy, abstract bird eyes are not visible.
Using another pad will be tricky, as most won't be long enough. The zipper above the load lifters is a waterproof #5, and leads to an inside compartment.
Upon which LNT guidelines are printed.