Scratch Built 5/16 inch Pink foam with skinned 1/8 inch Depron on the wings. The plane has water tight compartments for seaplane flight. This brings the weight up substantialy. Handling does suffer some. It is a quick change system for land or water. The plane weighs 42oz. and about 50oz. with floats. Fimed with Aiptek HD helmet cam. Music by Nat King Cole. "Straighten Up and Fly Right".