Mystery Ranch Urban Assault 21L. The color is Shadow. This Shadow version uses 1000-denier Cordura nylon, making it tougher than other colors. This is a genuine product handled by the official Japanese importer, A&F, and is brand new with tags. Urban Assault packs sold at bargain prices on Amazon and other sites are often counterfeit. The 24L version seems to have been left unsold, but the 21L has a cleaner design and is more stylish. Also, the subsequent Catalyst model has cost-cutting measures such as a glued-on logo on the harness, and I personally still think the Urban Assault is superior in terms of usability and durability.