ATY vs DTY: what is the difference?
Both are textured filament yarns. DTY gets its crimp from heat and false twist, so it is stretchy and smooth; ATY gets loops from a jet of air, so it is bulky, dry to the touch and looks like spun yarn. Choose DTY for stretch and drape, ATY for a spun look with filament strength.
Win Star Industries, Surat. Updated 21 October 2026.
How is each made?
DTY: partially oriented yarn (POY) is drawn and false-twisted over a heater, then untwisted, leaving the filaments crimped.
ATY: flat filament is overfed into a jet of compressed air that throws loops into the filaments and locks them, without heat crimp.
How do they look and feel?
DTY is smooth with a soft lustre and noticeable stretch. ATY is bulky and matt with a cotton-like hand, almost no stretch, and better cover for the same weight.
Which should I use?
DTY suits sarees, dress material, linings and knits. ATY suits shirting, suiting, upholstery, curtains and workwear, where a fabric should look spun but not pill or shed.
Does Winstar make both?
We make ATY ourselves at our factory in Kim and supply DTY in many counts and lustres.
From us
Air-textured yarn (ATY): airtex yarn textured with air at kim. See also the glossary and our other articles.