Features: When you're racing longer distances and have a need for solid fuel on the go, a top tube carrier is the most efficient solution This version of aero e-pack features a mount system on compatible frames with top tube direct bolts, or via the more conventional hook and loop and elastic lace lock combination This pack can fit virtually any frame and comes with aerodynamic benefits as it fits behind the stem out of the direct wind The slice shape tapers to nothing where it blends to the top tube and keeps out the way of brushing knees Two sizes of pack are available - compact 170mm and standard 240mm Made of durable nylon