Revelate Designs JERRYCAN 6L Top-Tube/Seatpost Bag BlackThe Jerrycan is a small rear mount specific bag to max out your carrying space. It's narrow, only 2" wide, so your legs don't hit it when peddaling. Good for carrying some spares, tools, or some food. Constructed with VX 21 fabric, padded ballistics nylon along the tube sections, yellow interior, Plastic HD side panel inserts, #5 YKK water resistant zipper, interior elastic keeps a multitool from rattling. At 2" wide, the Jerrycan is narrow enough