Filson's roll top bag. I've had it for around six years. The twill has broken in nicely and has handled admirably even in downpours without so much as getting anything wet inside.

Filson Creators Of Iconic Luggage For 30 Years

Carryology

Filson's Rugged Twill Rucksack Review: It's Not That Great

Signature Materials: Rugged Twill

Filson's Handsome Rolling Carry-on Bag is Made of Rugged Twill

Filson Bag Thread: With Pictures, Page 842

Filson Large Rucksack Otter Green, classic rucksack with style and

Tin cloth vs Rugged twill) Filson roll top backpack five-year

Uncompromise Your Day Trip with the Filson Rugged Twill Tote Bag

Convey™ II 27L Rolltop Backpack

Gear Review: The Fishpond Wind River Roll-Top Backpack - The Compleat Angler

5L Bluewater Roll Top Dry Bags, Waterproof Bags

Roll Top Backpack - Cycling Products - Yugo Messenger Bags – Gabriel Mendez Media LLC /Yugo Bags

Filson Dry Roll-Top Tote Bag Green, keeps your gear dry in any weather