An improved liner or suspension sleeve having an upper zone aligned above an articulating joint of a body a lower zone aligned below said articulating joint and a medial zone of flexure comprising ridges aligned with an posterior portion of said articulating joint whereby the region corresponding to an articulating joint or residuum has at least one of a different durometer and altered surface characteristics. The ridges allow flexion of the liner or suspension sleeve without substantial compression leading to buckling of the liner or suspension sleeve in the vicinity of the articulating joint.
