Do you have an integrated stem or have cables entering your top tube? Do you have top tube bolt bosses? Introducing Xlab's Stealth Pocket 500. Aerodynamically designed with a perfect 5:1 ratio which means no aero disadvantage. Testing has found without a Stealth Pocket 500, you lose up to 2 minutes in a race. Features a specially designed insert to maintain the aero form of the bag as you stuff it with your vital nutrition! Non-slip grip underneath bag ensures the bag stays put for up-front, easy access. Easy-slide, dual rubber zipper pull allows you to get your nutrition however it is more comfortable for you. Silver-colored interior makes it easy to see what’s inside quickly so you can turn your focus back to the road ahead. Can carry up to 6 gels.