This is pictures of two different materials, the Quickie is your traditional epoxy glass coated structure, yes there is glass in the resin, it's only .75 oz, very thin, but this is a 1/2A plane and weight is critical, but I like the durability of epoxy glass finishes, the other is your traditional Koverall, it's not sealed or painted yet, but this can be done in either way poly u or dope finish, the weave can be left to show or it can be filled.