This bag attaches to the assault pack, commonly know as the "A" Frame bag.  They were made to hold personal items such as socks, hygiene items and maybe a spare shirt.  Made from the khaki-green canvas material, it has the correct zinc grommets on the flap, web-buttoning tabs to be attached to the A Frame, web cotton ties and web straps to secure the bag's flap.  Underneath the flap it has a pocket for the K98 cleaning kit.