Every bike needs a seat bag. They're perfect for on-the-road repair essentials, your phone and credit cards, and a snack. Giant's Seat Bag features a stream-lined aero shape, water-resistant ProTextura fabric, reliable Velcro straps, a built-in key holder, and visibility-enhancing reflective accents. The Small and Medium models have external side pockets for extra storage. The Large and Extra large models have an expandable zippered bottom panel.