A prosthetic device's fiberglass or metal components are prone to become cold; in turn, that can produce pain and discomfort experienced in the remaining area where the device is located (e.g., hand, upper limb, lower limb, even nerve- or circulatory-related). Simple Abilities' Prosthetic Heating System, which involves the placing of customized liners over, under, or between layers of the prosthetic device, reportedly delivers comforting heat for up to 12 hours or more. Additionally, depending on the environment plus the client needs and activities, the company can provide a range of custom outer accessories to further act as insulators.