Amecotex&reg; - 1000m/1100y Variegated Polyester Embroidery Thread Set with 12 Colors for Machine Embroidery It has an elongation (stretch) average of 17-20%. Leading competitive products have elongation averages of 20-30% Lower elongation (stretch) levels result in the elimination, or significant reduction in looping and puckering problems A tighter range in elongation from spool to spool and color to color allows the operator to embroider different colors without making tension adjustments Lower elongation also allows the operator to back off on tension right from the first stitch Featured a snap down base to prevent your thread from unwinding and a rounded top for nice smooth flow off your spool no matter where your spool is placed on your machine