KEEN Commuter messenger bag, £85,

The Keen Commuter is a Polyester waterproof shoulder bag that works well both on and off the bike, thanks to a big, comfy, adjustable strap and good weight distribution.

A cavernous, compartmentalised inside space means you can shove in your bulkier belongings, and your 15" laptop gets its own padded compartment.

There’s a seemingly endless supply of useful inside pockets for everything from phone to keys to lip balm. If you need quick access to your water bottle, just put it into one of the two side pockets. A hard, waterproof bottom protects your belongings from accidental knocks when you put the bag down.

The padded across-the-body strap makes light work of heavier weights, and there’s an extra sternum strap for stability. Off the bike, the Commuter converts to hand luggage thanks to a sturdy neoprene-covered carry handle.

The commuter bag comes in four understated colours: black, burgundy, dark blue or grey. The use of rubber and aluminium components recycled from Keen's other products makes for reasonable green credentials.