NIB Lands' End Vintage Mens Duck Boot Thinsulate Sz 10M Dark Brown

NIB Lands' End Vintage Mens Duck Boot Thinsulate Sz 10M Dark Brown Purchased in 2000 - never worn Super Great Condition! l I don't see any wear on these at all, hence I'm calling them NIB. If they were worn it wasn't much as there is no dirt on discoloration that I see. I think the uppers are leather, but I don't see a tag anywhere so I can't say for sure. No obvious imperfections