Xenith 88 Backpack Graphite Grey - MD. The Xenith Series is built for anyone carrying large loads on extended trips where load-carrying ability and comfort are the paramount concern. The proven LightWire peripheral frame suspension creates the structure, while the BioForm CM hipbelt and harness provide a supportive and highly customizable fit. These packs offer superb pocketing, multiple zip access points into the main compartment, side pockets and a convenient way to carry a reservoir. They accomplish all of this while being a category leader in weight and value.