... use in quilt,winter cloth,sleeping bag,pillow,cushio polyester staple fiber/hollow widely used in spin, toy,quilt,winter cloth, ... etc.The composition are polyester.conjugated silicon or not.1.5d*38mm STAPLE FIBER2/2.5d*51mm NON-SILICON OR SILICON3d*64mm HC HCS7d ... *32mm HC HCS7d*64mm HC HCS15d*32mm HC HCS15d*64mm HC HCS polyester staple fiber/hollow fiber