The bottom left picture shows the inside of the expandable section of the pack where the meat is typically hauled. There is no significant staining. I just looked at the pack again and the only staining that I can tell is on the triangular flap shown in the picture of the expanded area where the pack is opened up. It is minor staining. I am only selling because I am going to go with one of the expensive frame packs (likely Kifaru) as I am planning a full pack in hunt this year. I would keep this pack too, but I have spent too much upgrading other gear this year, so something has to go.