The UNDFND One Bag looks like a designer messenger bag, but is far more dynamic and modular than you'd expect. The majority of the bag is modifiable, allowing you to transform it into the bag you need right now, rather than switching your gear in and out of a variety of different containers.
The One Bag is made of water-resistant neoprene and features several modifiable parts. Most notable is the front cover. It contains its own storage compartment and is completely removable, so you can store different items in different covers and simply swap them out when you need to change your bag's inventory. By default, the One Bag operates as a standard laptop bag, but with an insert you can turn it into a three-lens camera bag. There is also a waist shooter bag that you can use to carry additional lenses. It'll clip on to your belt, or you can use a strap to sling it over your shoulder. This back features exchangeable front covers as well. The covers come in multiple styles, so you don't have to switch them out for utilitarian purposes. If you get bored with one look, you can simply change to another.
However you decide to assemble it, the One Bag is very comfortable to wear. The padded strap makes the weight feel more gentle on your shoulder balances the bag well on your hip. Exchanging covers and inserts is very simply. It's handled by velcro, which seems like it wouldn't be terribly sturdy, but it because the seal is made on both sides and tucked into the bag it holds just as well as if it were sewn in.
The only thing I found to be problematic is that the bottom of the photography insert has no bottom. This was intentional, in order to keep the insert's spatial requirements to a minimum, but I think that even a thin layer of fabric at the bottom would be nice just to make it easier to remove all the contents in one simple lift. That aside, the One Bag is very versatile, stylish, and comfortable. If it doesn't suit your needs one day, you can simply change it so it does.