The Stealth Pocket 300 mounts directly to your top tube on the bolt bosses found on some bike models. It has a 72-degree front that fits tight up against the stem to eliminate turbulent air pockets. The bag reduces drag caused by the stem and headset spacers (note: measure stem height to height of bag). The silver-colored interior makes it easy to see what’s inside quickly so you can turn your focus back to the road ahead. It features a specially designed insert to maintain the aero form of the bag to help you go that much faster!