This very packable bag from YNOT is SUPER minimal, very simple, and a favorite choice of mine for packing away into a larger travel bag for daily use.
I get into this bag at 1:30 in this video:
Be sure to check out the list of my favorite packable daypacks.
Other Bags to Check Out:
The Mountain Briefcase from Topo has been one of my favorite personal daily carry bags due to it's look and feel as well as the perfect size for my style of daily carry.
The Daypack from Qwstion has serious design chops. It's simple and elegant with thoughtful organization for modern business folks who need backpack/briefcase conversion. It even works to wear with a suit!
The Travel Sling from Aer is a stylish, well made daily sling that fits up to a 13" laptop.
The Mercator from Cecilia is an absolutely gorgeous, hand crafted backpack with loads of organization, customizable photo and tech storage and great external access.
A unique daily carry bag with rock-solid build quality and a killer external pocket setup from a classic American brand.