Rainbow Blending 
Thread makes stitching and blending fibers a breeze.  This thread is a 
metallic filament wrapped with and supported by nylon fiber for 
unbeatable strength, integrity and memory.  Rainbow Blending Thread is 
even strong enough to stitch alone as well as in combination with other 
fibers.  70% Nylon/30% Metallic Polyester.  35 yards/card.