The Omni Trekker convertible backpack/shoulder bag fits into the waterproof Trekker Extreme hard case (PelicanŽ 1550). It has a unique removable/hide-away backpack harness; rugged metal hardware; a reverse-open lid; front and top zippers (so you can grab gear even when it's inside the Trekker Extreme case); removable tripod straps; laminated mesh pockets; padded, contoured shoulder strap; and fully customizable interior.