Serfas Stem Bag velcro Carry everything you need for your next bike ride Check out one of our expandable bags to accommodate an extra tube or a bigger Multi-tool Our secure zipper closures give you the Peace of mind that what you put in your bag will be there when you need it Designed to attach to the top tube Mesh Velcro top 3 Velcro Straps for secure mounting Easily holds cell phone, car keys, wallet, nutrition bars, etc. Water Resistant Fabric