Ten years ago I had Dan build a pack to my specifications that is relatively light. It is built on the SARC pattern but has no zippers in the body, no Cordura, only light pack cloth, and a relatively narrow, simple hip belt with a single buckle. The pack weighs about 4.5 pounds and carries weight as well as any Dana Designs, ArcTeryx, or Gregory that I have used and climbs better than the Cold Cold World Chaos or Wild Things Andinista. It is also incredibly durable and has shown almost no wear in 10 years.