The Cozy III is a 3-seat, single engine, homebuilt light aircraft designed by Nat Puffer.

Urethane foam is used to form highly curved, hand-carved shapes such as the nose and wing tips.

Blue rigid styrofoam is cut with a hot wire saw to form the wing cores.

Two types of woven fiberglass are used to provide the surface strength of the composite sandwich.

The builder does not need pre-fabricated items to finish the aircraft except for the landing gear bow and nose gear strut which require forms and an oven for post curing, but suppliers exist for these parts, such as Featherlite of Ukiah CA.