Their frames are made of fiberglass-reinforced plastic, with vinyl-covered galvanized-steel mesh to keep the fish in and the seals and sharks out.

FORBES: Magazine Article

And its plastic and fiberglass construction would weight little.

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However, a partnership between Ford and Weyerhauser has led to the development of plastic composites made out of cellulose instead of fiberglass.

FORBES: Written by Melissa Hincha-Ownby