So this is my attempt to fill the hole in my backpack quiver b/w super ultralight (I made a 3.3 oz 1800 cu in pack 2 years ago) and my packrafting and longer/heavier travel pack (my ULA circuit). I made it using almost all pieces of leftover fabric from other projects and I tried to use the fabrics that made the most sense in regards to their optimal usage. I used a strechy and durable urethane coated 4 oz nylon for the shove it (orange fabric), I used a dyneema fabric for the bottom back panel,hip belt and shoulder straps (black fabric with white ripstop), though the hipbelt is with the slippery and normally outward facing side sewn inside, and the sticky normally inward facing side out. This will hopefully limit the amount of upward hipbelt migration the user experiences. I used a 4 oz oxford for the sides and back of the pack (all black), and I used a 1.35 oz silnylon for the extension sleeve. All seams are triple stitched that bear load and all other seams are double stiched. I left a wing of fabric on some of the seams, which I would use to enclose the raw edges on the double stitch. The pack will be getting its first field test this week, 24 hour trip style, as I am doing a quick jaunt out to do the first third of the wasatch 100 course (snow and all). Any and all feedback would be appreciated. There are a few things that I can see I would already change at the moment. First, I will make hipbelt pockets which extend the hipbelt padding around my hips another 3 inches on each side during loads in excess of 15 lbs. I also would sew the webbing at the top of the shove it to the outside of the pocket to limit the amount that the shove it pocket's edge flips over when I pull all of the compression straps tight. Final packweight is 12.4 ounces with a rough estimate of volume around 3000 cubic inches including shove it and extension sleeve.
The design synthesis comes from a number of sources including shoulder straps from my ULA circuit, and shove it design from my own head, though a similar design was used by Ron Bell with one of the iterations of his prophet pack (I think). The bungee compression was taken from Z packs, and thus far, the synthesis of all of these ideas seems to be working out really well. My first field test will tell me more.<img src="/backpackinglight/user_uploads/1258152944_17921.jpg" alt="Side view. Pack has gaiters, raincoat and 2 water bottles in the shove it." width="550" height="733"><img src="/backpackinglight/user_uploads/1258153334_17922.jpg" alt="From the back" width="550" height="733">