DULUTH (AP) — A Duluth maker of outdoor gear plans to introduce duffel and shell bags made of material once used in the roof of the Hubert H. Humphrey Metrodome.

The bags will be made by Duluth Pack — but they won't be cheap. The duffel bag is listed at $485 and the shell bag at $160.

Twins announcer Jim Cunningham and Tim O'Phelan bought the entire inner layer of the Metrodome roof after it collapsed in 2010. They spent $4,000 for the Teflon-coated fiberglass, with an area of about three acres.

They weren't immediately sure what to do with it. But they say when they realized how durable and water-resistant it was they knew it could be used for making heavy-duty bags.