Kevlar Thread 8 yards
VDD, from Teank Think Tank, has been one of the most successful-and destructive-antweight robot designs. Now you can get a start on your own VDD with these parts.
So I've used this a lot. I highly recommend getting a curved needle set, of course it all depends on the angle that you're sewing. Just so everyone knows, I've tried regular thread it just breaks. You need the Kevlar stuff.
$3.00 
Graphite Carbon Fiber Rods