A seal component for a prosthetic liner, the seal component comprising: a body having open first and second ends defining an opening therethrough and an internal surface about an axis (D-D) and an outer surface extending generally parallel and radially spaced from the axis (D-D), the body having at least two seals (810, 812) located between the open first and second ends and protruding at least in part radially outward beyond the outer surface and relative to the axis (D-D), the body forming a lower portion at the second end and having a transitional geometry; a sleeve having a tubular form and a first end inseparably secured to the open first end of the body and having a different elasticity from the body, the sleeve extending co-axially beyond the open first end of the body such that the sleeve is spaced away axially from the at least two seals (810, 812) such that a second end of the sleeve opposite the first end defines an entry point for the seal component; wherein the sleeve is formed from a textile and the body is formed from a polymeric material; characterized in that an interface between the sleeve and the body is located at the first end of the body, such that a length of the sleeve extends into the body, the interface defining a recess about the open first end and along the internal surface, the recess arranged to receive a thickness of the sleeve; wherein at least one rib is formed between the at least two seals (810, 812), the at least one rib radially extends less than the radial extension of the at least two seals (810, 812); wherein a thickness of the at least two seals (810,812) tapers at a distal tip. a body having open first and second ends defining an opening therethrough and an internal surface about an axis (D-D) and an outer surface extending generally parallel and radially spaced from the axis (D-D), the body having at least two seals (810, 812) located between the open first and second ends and protruding at least in part radially outward beyond the outer surface and relative to the axis (D-D), the body forming a lower portion at the second end and having a transitional geometry; a sleeve having a tubular form and a first end inseparably secured to the open first end of the body and having a different elasticity from the body, the sleeve extending co-axially beyond the open first end of the body such that the sleeve is spaced away axially from the at least two seals (810, 812) such that a second end of the sleeve opposite the first end defines an entry point for the seal component; wherein the sleeve is formed from a textile and the body is formed from a polymeric material; characterized in that an interface between the sleeve and the body is located at the first end of the body, such that a length of the sleeve extends into the body, the interface defining a recess about the open first end and along the internal surface, the recess arranged to receive a thickness of the sleeve; wherein at least one rib is formed between the at least two seals (810, 812), the at least one rib radially extends less than the radial extension of the at least two seals (810, 812); wherein a thickness of the at least two seals (810,812) tapers at a distal tip.