The Tech Sling from Aer boasts a solid amount of organization and space for loose gear. Features a space for a 13″ laptop.
Other Bags to Check Out:
The Atlas Executive Holdall from Waterfield is an excellent large-ish capacity shoulder bag designed to help you shift seamlessly from tech gear to gym gear.
The Freerain24 2.0 from Matador is an unbelievably light pack that offers incredible packability and water resistance for your daily travel needs.
The Transit Sling from Heimplanet is a smaller daily sling bag made with an interesting and nice feeling outer material.
The Subterra backpack from Thule is designed to be a minimal travel bag with room for both your tech needs, daily needs and weekend travel needs.
The Aer Duffel Pack is not the tool for every job, but for particular uses it just might be perfect for you.