The invention relates to a liner for the rehabilitation of fluid-conducting systems, comprising a) an inner film tube based on a thermoplastic, b) an outer film tube based on a thermoplastic, and arranged between the inner and the outer film tube, c) at least one fibrous tube based on a composite material that consists of (c1) industrially generated inorganic fibers, natural fibers or mineral fibers and (c2) man-made fibers, said fibrous tube being impregnated with a curable resin.
