Abstract: A fiber optic cable includes a core comprising a plurality of cable subunits configured such that an outer group of cable subunits surrounds a central cable subunit. each cable subunit includes one or more optical fibers, a buffer tube surrounding the one or more optical fibers, a strength layer surrounding the buffer tube, and a subunit jacket surrounding the strength layer. A thin film outer sheath surrounds the core, wherein the thin film outer sheath loads the outer group of cable subunits normally to the central cable subunit such that contact between the outer group of cable subunits and the central cable subunit provides coupling therebetween, limiting axial migration of the outer group of cable subunits relative to the central cable subunit.