Purchased last year, used about twice for climbing Mt. Fuji and commuting. I don't think there are any scratches or stains. I'm selling it because it's a bit over-specced for me, and I'm using something else. It seems to have a wire frame, and the back is sturdy. - Size: M - Brand: MILLET - Model Name: GRX17 - Color: Black - Features: With multiple pockets - Internal Structure: Main compartment and small pockets Thank you for looking.