An interface for use between the socket of a prosthesis and a limb liner. The interface has a double-layered body having a bottom end and an open top end. A mounting pinhole can be formed through the bottom end so that a connector pin on the limb liner can extend through the interface and engage the prosthesis. Alternatively, the bottom end can be formed without a pinhole to accommodate a non-locking type liner. The interface has an interior layer, an exterior layer and an interposed gap space. A vent is provided for selectively controlling airflow into and out of the gap space. The gap space can be inflated in one of two ways. First, the gap space can be made self-inflating by placing open cell foam material into the gap space. Second, a manual pump can be attached to the interface that actively pumps air into the gap space.
