A surgical access assembly comprising: a sleeve assembly including a proximal ring, a distal ring, and a sleeve defining a passage therethrough, the sleeve extending between the proximal and distal rings, wherein the sleeve of the sleeve assembly is rollable about the proximal ring; a base member (150, 250, 350) including an annular body including a coupling member (160, 258, 360), the annular body defining an opening (155, 352) in communication with the passage of the sleeve, and a circumferential groove (254, 354) configured to support the proximal ring of the sleeve assembly; and a sealing assembly (180, 280, 380) including an annular frame (182, 282, 382) and a seal (188, 288, 388) dimensioned to cover the opening (155, 352) of the base member (150, 250, 350) in a sealing relation, wherein the coupling member (160, 258, 360) of the base member releasably secures the sealing assembly to the base member, the annular frame (182, 282, 382) of the sealing assembly configured to be in registration with the annular body of the base member, such that the proximal ring is interposed between the base member (150, 250, 350) and the sealing assembly, wherein the seal (188, 288, 388) includes a body (188a, 288a) received in the opening (155, 352) of the base member (150, 250, 350) and an overhang (188b, 288b) extending radially outward from the body (188a, 288a); characterized in that the annular body of the base member (150, 250, 350) includes a plurality of lips (154, 358) disposed radially inward of the proximal ring of the sleeve assembly, the lips circumferentially arranged to concentrically retain the proximal ring within the circumferential groove (254, 354) of the annular body; the circumferential groove (254, 354) supports the proximal ring of the sleeve assembly such that a portion of the proximal ring extends proximally from the base member (150, 250, 350); and the annular frame (182, 282, 382) and the body (188a, 288a) of the seal (188, 288, 388) define a gap therebetween, the gap dimensioned to receive at least a portion of the proximal ring of the sleeve assembly. a sleeve assembly including a proximal ring, a distal ring, and a sleeve defining a passage therethrough, the sleeve extending between the proximal and distal rings, wherein the sleeve of the sleeve assembly is rollable about the proximal ring; a base member (150, 250, 350) including an annular body including a coupling member (160, 258, 360), the annular body defining an opening (155, 352) in communication with the passage of the sleeve, and a circumferential groove (254, 354) configured to support the proximal ring of the sleeve assembly; and a sealing assembly (180, 280, 380) including an annular frame (182, 282, 382) and a seal (188, 288, 388) dimensioned to cover the opening (155, 352) of the base member (150, 250, 350) in a sealing relation, wherein the coupling member (160, 258, 360) of the base member releasably secures the sealing assembly to the base member, the annular frame (182, 282, 382) of the sealing assembly configured to be in registration with the annular body of the base member, such that the proximal ring is interposed between the base member (150, 250, 350) and the sealing assembly, wherein the seal (188, 288, 388) includes a body (188a, 288a) received in the opening (155, 352) of the base member (150, 250, 350) and an overhang (188b, 288b) extending radially outward from the body (188a, 288a); characterized in that the annular body of the base member (150, 250, 350) includes a plurality of lips (154, 358) disposed radially inward of the proximal ring of the sleeve assembly, the lips circumferentially arranged to concentrically retain the proximal ring within the circumferential groove (254, 354) of the annular body; the circumferential groove (254, 354) supports the proximal ring of the sleeve assembly such that a portion of the proximal ring extends proximally from the base member (150, 250, 350); and the annular frame (182, 282, 382) and the body (188a, 288a) of the seal (188, 288, 388) define a gap therebetween, the gap dimensioned to receive at least a portion of the proximal ring of the sleeve assembly.