18/3 cord linen thread, made from only the highest quality natural flax by Coats Barbour for over 200 years.

Will not stretch, holds knots tightly, and gets stronger when wet. It is easily dyed, and has an excellent appearance in stitched leather seams. Often used in bookbinding and for hand stitching. 

Sold by the metre. A full spool is 180 metres

Available in 3 colours: Natural, Brown and Black