This summer I needed a lightweight backpack that met the following criteria: (1) would hold a 14-inch MacBook Pro in a padded sleeve; (2) would pack easily in a 25-inch roller bag, without taking up much space or weight; and (3) would look professional, without lots of exterior pockets, straps, etc. The Daylight Backpack was perfect for that role. For conferences and library research, I put my laptop, charger, and a few other essentials in the main compartment, and umbrella, water bottle, and sundries in the outside zip pocket. For tourism, the laptop stayed home and my binoculars, sunglasses, raincoat, and other useful stuff went in the main compartment.
I have a few other bags that would have worked, including an Osprey day pack (lightweight but doesn't look professional), a Bihn packing cube backpack (lightweight but no padding on straps and not exactly professional either), and a Matador ultra-light waterproof backpack (very lightweight, but no padding on straps, and black, which isn't great in the sun). The Daylight, with its simple lines, looks much better than the others (important when taking the bag into museums and stores) and had more structure and padding than the second and third. And it looked pretty similar to the small, low-profile backpacks that a lot of people (mostly men, but some women too) carry in Paris and Helsinki these days, so it doesn't necessarily scream "tourist!"
For every trip, I consider carefully the bags I need, but I'm pretty sure that the…