Starlite pack, about 2-3 years old. Medium belt w/pockets. Adjustable torso. Read specs here: http://www.sixmoondesigns.com/packs/Starlite.html
The pack is in structurally great shape (no rips/holes/tears). It has been used, though (it was my workhorse winter pack), so there's some dirt/sweat on it. And this is the older version with 2 aluminum stays, not one single connected stay as the new ones have.