An external breast prosthesis includes an elastomeric skin in the form of a human breast surrounding an inner material such as a silicone gel or hydrogel. The inner material may be of a defined shape or may be amorphous and conform to the shape of the elastomeric skin. The elastomeric skin can be formed from a front skin and a rear skin, and the skins can be made of a soft styrenic elastomer having attributes similar to a gel. The elastomeric skin can be substantially soft to the touch and have an elastic memory that tends to maintain the skin in a pliable yet pre-defined shape.