Superior Threads has taken the very best from Mother Nature's pallet to create  vivid Rainbows of color for those special creations. Twenty-eight rich and  lustrous variegated color patterns add warmth and dimension to embroidery,  quilting or decorative stitching. A strong trilobal filament (not spun poly)  polyester thread, Rainbows is soft enough to sew the most detailed designs and  has a sheen that rivals the finest silk. Variegated color intervals are an  amazing 1 inch (compared to 8 inches on other brands). Short, uniform color  intervals provide maximum variegated effects.
Spool sizes: 500 yds. ($7.99)  and 2,000 yds. ($19.80)