If you often go straight to the gym from work, you'll find Filson's 'Dryden' briefcase a robust and reliable option. This limited-edition version is cut from camouflage-print ballistic nylon - a material first developed for WWII servicemen - and trimmed with vegetable-tanned bridle leather straps and handles. Unzip it and you'll find a host of pockets for keeping smaller items and your laptop safe. Off on a trip? The trolley strap will neatly slip over your suitcase handles while travelling.