The messenger you may have trouble filling up. The Tomahawk, our largest messenger, made of nearly indestructible material can be filled to the brim. Dont like to unbuckle a messenger? Tomahawk has the highest grade Velcro to keep it closed without clipping. For easy access, a top zipper allows entry into the bag without opening the flap. This bag features the ECBC FastPass System allowing you to unzip the specialized electronics compartment, lay the bag flat on the security conveyer and go through TSA without unpacking laptop, tablet and cables.