Filson Dryden Briefcase (Otter Green) Got this bag as there are few Filson products that come with a trolley strap. But ended up deciding to go with one of their backpack options instead. New/Never Used. Details below: The versatile Dryden Briefcase is made of abrasion-resistant 1000D Cordura® nylon that holds up to heavy use. A padded sleeve fits laptops up to 15", and a trolley strap slides over luggage handles. Water-repellent, abrasion-resistant 1,000-denier nylon Double layer over bottom for increased durability Two large exterior pockets Interior slotted patch pockets Trolley strap slides over luggage handles Imported 14L 16"L x 3¾"W x 12"H 2 lbs. 3oz.