The Khamsin 30 is one of the Arc'Teryx ultralight/minimalist series of packs from the early 2000's. I'm not sure when they stopped making the Khamsin series, but I don't think they lasted more than a couple years.
This is a good pack, as far as lightweights go, especially considering that it was one of the first on the scene
This pack has been on a hike up in the mountains between Bear Lake and Logan Utah. It's a nice area -- you should go there sometime!
See Google MapThis pack worked pretty well, but I think I had it loaded up way past what it's designed to carry. The little 30mm wide hip belt/strap doesn't have any padding (to save weight surely), and it's probably only meant to carry 10-15 pounds tops. But I do like the fact that it's got an aluminum stay as well as a frame sheet. So many ultralight packs are spineless these days!