1. A laminate of a casing being integrally made by a first felt layer, a support layer and a waterproof layer, the first felt layer and the support layer both having a first surface and a second surface opposing the first surface, the second surface of the first felt layer being melted to bond with the first surface of the support layer, the waterproof layer being bonded with the second surface of the support layer, wherein the support layer is made of felt.