Excellent materials. Two main compartments (middle one is expandable) and a front "grip it and rip it" pocket. Stowable backpack straps.
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Converts from backpack to briefcase with external access and style for days.
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Easily one of my favorite briefcase-type bags due to it's excellent materials, organization, and classic aesthetic.
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King Kong's bomber gym-bag DNA dressed up in Scottish waxed canvas. Structured enough to sit upright and play briefcase (16" laptop sleeve, removable shoulder strap), organized enough for the gym, and the luggage passthrough makes it a legit weekender. Gets better looking as it beats up — and there's a 25-year warranty behind it.
A compact, organized duffel that doubles perfectly as a briefcase.
The Slim Pack from Aer is a sleek, all matte black compact daily carry bag with simple, but solid organization and excellent durability.
The Forge from Black Ember is a convertible backpack-briefcase-messenger with expandability from 20-30L.