The Vapor Trail is a favorite of Appalachian Trail thru-hikers. It weighs about 2 pounds and still carries 30-pound loads in amazing comfort, thanks to the Vapor Frame technology. The pack is carefully engineered to withstand thousands of miles of use while offering a level of comfort not previously found in a lightweight pack. The bottom line: the thru-hikers choice. Cordura Fabrics make this pack durable. The yarns of the pack cloth are High Tenacity, which means they were stretched as they were made, making them much stronger than regular nylon yarns. The award winning Vapor Suspension is light, relatively simple and very effective for carrying moderate loads of up to 30 pounds. Because of the way the sculpted shoulder strap and belt tie into the high density polyethylene frame this system does an excellent job of automatically contouring the dual density foam back panel to your back. Best of all this is accomplished without the use or the extra weight of an aluminum stay. 3900 cubic inches (64 liters) 2 lbs. 2 oz.