filaments e g a 50 denier bundle consisting of 5 filaments into conventional bulked i e crimped continuous filament singles carpet yarns 4 and 5 e g 1250 denier yarn consisting of 60 filaments by means of an air tangler yarn 1 is then heatset during heatsetting of yarn 1 bundles 6 and 7 shrink causing yarns 4 and 5 to buckle as shown in fig2 and 3 some breakage of high shrinkage acrylic filaments may occur by this method because the acrylic filaments are fragile of course the high shrinkage filaments can be inserted into the singles carpet yarn by hand or other appropriate method if desired conventional bulked continuous filament nylon carpet yarns have a denier in the range of 1000 to 2000 in fig2 and 3 a portion of yarns 4 and 5 is broken away to expose filament bundles 6 and 7 which otherwise would be hidden high shrinkage filaments such as polyester filaments useful for practicing the present invention can be made by known techniques selected to provide the desired shrinkages the plied yarns may also contain other components such as antistatic filaments and additives such as delustrants and antisoiling agents conventionally employed from time to time in the manufacture of carpet yarns according to one embodiment of the invention special styling effects are achieved by subjecting yarns of the present invention to stuffer box crimping just prior to heatsetting in this instance while there is no cost advantage over conventional trackless cabled carpet yarns there are aesthetic advantages that are not achievable with the conventional yarns bulk and shrinkage values of filaments are determined by.