The Skycrane II™ is a modular, load- bearing system consisting of three primary bags: The base pack, the removable Little Brother™ and the MultiLid™. A completely scalable system, the Skycrane II is built around a 2,300 cubic inch base pack that employs our patented Cam Expansion System™. Range all the way down to a fanny pack, or up to a 4,475 cubic inch freighter, the Skycrane II can carry whatever your mission requires.