High-volume carrier rack bag. Expandable main storage compartment with protection foam inner. Two side compartments with expanding pannier side pouches. Backside equipped with strap for LED attachment. 4 velcro straps to secure the bag to the rack, cannot move forwards or sideways. Bungee storage system. Adjustable shoulder strap which can be removed. Compatible with RainCover (BSB-96), to protect against rain and dirt. Reflective elements for extra visibility.