Available in 15- and17-inch sizes, the Hipslip, from the Southern California-based Shootsac, brands itself as a "laptop sleeve with 'benefits'." Though scarcely larger than a laptop sleeve, this slim laptop case comes with extra pockets, a removable shoulder strap, and interchangeable fabric covers.
The $99 Hipslip has two expandable exterior pockets that can accommodate a power cord, a mouse, and other peripherals--and they lie conveniently flat against the outside of the bag when not in use. The removable strap snaps on with sturdy buckles and the interchangeable fabric covers (sold separately for $35 each) attach via Velcro strips. Neoprene padding protects the bag's contents.