The Metro L Messenger is a new model year 2020 bag from Brompton. It's approximately 16" wide, 12" high, and 6" deep; it comes in black, and has a 23 liter capacity.
The front flap has an external zipper at the top that opens a considerably large pocket; it can hold a book, miscellaneous personal affects, and even a rain jacket and small umbrella. The flap is held shut with velcro for easy opening and closing and, optionally, with two buckles for even more security.
Under the flap there's two medium sized pockets that can hold small to medium sized devices and notebooks, and there's four loops for hanging some pens. Behind these pockets is the main compartment that includes a padded laptop sleeve, a mesh pocket for chord management, and ample storage for files and larger items.
The outside of the bag has a stretchy mesh pocket on each side that's a good spot for things like a spare tube and sunglasses. On the back side are two buttoned pockets that face the rider while on the bike, perfect for a water bottle or coffee tumbler. The integrated shoulder strap on the top has a cam lock to quickly adjust the strap's length, making the bag easy to take on and off over the head. The handle is made from rubberized webbing that's both firm and flexible, meaning the Metro L Messenger fits on all Brompton handlebar types.
The outer material is 1000D Cordura with a PU coating, and the inside of the bag is 100% nylon. This combination means the bag is prepared for daily, regular use, even in a light rain. The bag is also ready when the weather turns bad, as it comes with a high-visibility, reflective "shower cap" that slips over the bag making it waterproof in the worse downpours.
The Metro L Messenger Bag is the right pick for someone wanting a larger size day bag for commuting on a Brompton in all weather that's also organized for the office.