An electronic device such as a mobile phone having user changeable composite covers formed by a two-shot process. The covers are removable and are adapted to slide onto and off the electronic device/mobile phone to thereby enclose the electronic device/mobile phone in a water-resistant/dustproof manner. The composite covers include resilient regions with buttons formed therein that cooperate with control elements in the electronic device/mobile phone. The composite covers are formed by a two-shot process that involves the use of a transparent material in a first shot to provide a hard cover having a number of openings there through. The second shot involves the use of the transparent hard cover as a core onto which an elastomeric layer is applied, so that some of the openings in the hard cover have buttons formed thereon, whereas other regions and openings in the cover are not covered.