Heavy duty, waterproof (IPX3) trunk bag made from durable tarpaulin materialAvailable with Basil`s Universal Bridge System (UBS) for mounting to virtually any carrier, or with their pre-installed MIK mounting plate for use with MIK compatible racksInterior roll top closure with buckles ensures your belongings stay dry in any weatherPadded interior compartment for phone or camera keeps expensive necessities safeRemovable shoulder strap allows easy transportation off the bikeShock cord top is perfect for securing and extra bottle or jacketReflective accents and light mounting points aid visibility and increase safetyUBS / Straps12.6x7.9x7.9`427 c.i.Black/OrangeX-Large (301-500 c.i.)