includes a drafting frame 12 to which a staple sliver 14 is fed in the direction of arrow 34 a 34 in the drafting frame 12 a staple sliver 14 such as from cotton is drawn to the desired size as is known in the art the drafting frame 12 preferably has bottom rollers 16 18 20 22 and top pressure rollers 26 28 30 32 top and bottom aprons 34 36 are driven by rollers 32 22 respectively also as is known the resulting staple fibers 14 are prepared to be spun a stretch textured multifilament s twist clockwise twist yarn 50 such as a stretch 34 s 34 twist 70 denier 34 filament yarn is withdrawn from yarn supply 38 through guide 40 pretensioning device 42 and ceramic thread guide 44 located downstream of the aprons and before top and bottom nip rollers 46 48 the pretensioning device 42 is preferably an adjustable spring loaded cymbal tension device that the multifilament yarn 50 is passed through so that the yarn can be adjusted to provide the best results other known tensioning devices may be employed as seen in fig2 a when the stretch textured 34 s 34 twist multifilament yarn 50 is removed from its supply it is in a crimped state with inter filament gaps caused by the random abutment of.