A method of manufacturing a fiber optic cable includes steps of extruding a first jacketing material around strength members, over armor, and to form a cavity between the strength members and beneath the armor. The cavity is configured to support an optical fiber. The method further includes a step of co-extruding a second jacketing material with the first jacketing material to form a discontinuity of material, where the discontinuity is interior to the exterior surface of the fiber optic cable.