Seralene is a strong but very light weight, fine, 2 ply continuous polyester thread.
I like to use this thread in my bobbin for all my applique work. It's a lot less bulky and beds into the fabric better. Because it is so fine, a bobbin full goes a very long way.
I'm stocking Colour No. 1000 white and Colour No. 4000 black. 100% polyester
2000m reels