The Cooper pattern from Colette gives you three different bags from one basic body: messenger, backpack and satchel. These highly durable bags can be made in a range of sturdy fabrics, like duck canvas, waxed canvas, twill, and heavy ticking. All versions are lined and feature eight large pockets, magnetic closures and hardware details. The messenger bag has an adjustable cross-body strap. The backpack has two shoulder straps and a hang loop. And the two-handled satchel does double duty as a bike pannier. Click on the alternate thumbnail images for fabric and supplies requirements.