Expand Your Bikepacking Horizons With The M.U.L.E. Handlebar Pack. Its Topload Design Allows For Expandability, While The Ultra-Secure Mounting System With Aluminum Stay Ensures Your Gear Stays Put On Even The Roughest Terrain.. Features. Ipx5 Waterproof Rated. Aluminum Stabilizer Bar. Roll-Top Expandable Capacity. Side Pockets. Reflectivity. 12L Capacity Dimensions: 9.8 x 16.9 x 5.