A system for joining a limb liner (12) to a prosthesis (18). The prosthesis (18) has a socket(16) that is joined to the remainder of the prosthesis (18) using a hub assembly (34). The hub assembly (34) includes a first hub (32) and a second hub (33). The first hub (32) is disposed within the interior of the socket (16). The second hub (33)is disposed outside the interior of the socket (16). An air conduit (36) extends through the hub assembly (34) that enables air to be drawn into the socket (16) and/or vented from the socket (16). An inflatable interface (22) is disposed within the socket (16). The inflatable interface (22) receives air through the air conduit (36) in the hub assembly (34). The inflatable interface (22) is capable of filling any gaps that may exist between a limb liner (12) being worn by an amputee and the socket (16).
