The main compartment makes it easy to reach your fuel. Access the main compartment with a breeze with an easy slide top zipper! The bottom of the SCICON Fuel Bag is made of tough rubber, that will save your top tube from scratches and abrasions. It can easily be mounted and removed in seconds and fits nearly every bike frame due to the adjustable straps. The 2 point mounting straps attach to the frame tightly fixing the bag in position.