Abstract: A heat transfer device includes a vapor chamber that houses a phase change material such as water. The heat transfer device may be selectively formed from a combination of polymeric and non-polymeric materials. In one embodiment, the vapor chamber is formed from a polymer layer surrounding a sealing layer formed from non-polymeric material. The heat transfer device may further include one or more fin members operable to diffuse heat from the vapor chamber to the ambient/outside environment. The fins may be solid structures, or may each define a fin chamber in communication with the vapor chamber. In one embodiment, the fin members are formed from non-polymeric material.