Topeak Tri DryBag Waterproof Bicycle Top Tube/Stem Bag Used by both professional and amateur riders alike Made using high quality materials and components Tested to ensure quality and durability 65 g / 2.29 oz Sonically welded provides waterproof protection Large main compartment holds all the essentials and keeps contents close at hand Straps securely to top tube and head tube Straps securely to top tube and head tube