are filaments with multiple layers surrounding a core yarn where the core and layers are distinguishable from one another so as to indicate fabric wear also disclosed are conductive monofilaments used to detect fabric wear multilayer filaments used to create a guideline on a fabric and a conductive monofilament that also has a contrasting color used to form a fabric guideline application_number US 60863003 A description a preferred embodiment of the present invention will be described in the context of filaments and fabrics woven therefrom used in papermaking however it should be noted that the invention is applicable to the fabrics used in other industrial settings where wear detection and guiding are of importance fabric constructions include woven spiral wound knitted extruded mesh spiral coil and other nonwoven fabrics these fabrics may also include monofilament plied monofilament multifilament or plied multifilament yarns and may be a single layer weave a multi layer weave or laminated when the fabric is a spiral coil fabric the filament can be the coils the yarns used to connect the coils or the inserts stuffers that may be present in the coil interior void the yarns are typically extruded from any one of the synthetic polymeric resins such as polyamide and polyester resins used for this purpose by those of ordinary skill in the industrial fabric arts an example of the multilayer filament 10 of the present invention is illustrated in fig1 cross sectional.