Accordingly, aspects of the present invention are premised upon the use of a propylene-ethylene copolymer that has an ethylene content of about 3 to 25 wt. % (e.g., 5 to 15 wt. %), a melting range of about 50 to 135??? C., and a flexural modulus of about 8 to about 325 Mpa or higher (e.g., at least about 375 MPa), and a second thermoplastic material that includes a polyolefin, such as a propylene-