The FBC Mail Bag is a medium-sized, utilitarian bag with a brutalist design, featuring a rigid, angular structure made from a dark, weathered leather. Its surface is slightly rough with visible stitching and metal reinforcements at the corners, giving it a sturdy, industrial look. The bag has a simple yet functional design with a top flap secured by a large, metallic buckle, and the Federal Bureau of Control logo is embossed on the front in a muted, almost faded manner, aligning with the game's surreal and bureaucratic aesthetic.