These traditional shibari ropes are made from Jute Sammt.
They are conditioned and have an overhand knot at both ends. The rope is wasched and hung with tension. It is mechanically broken (by hand) to make it more supple. It is flamed to remove sharp fibers. Then they are oiled for a smooth and soft touch. 
Like most Shibari ropes, they get smoother as we use them.
 
These 8m shibari ropes are available in the diameters of 5mm and 6mm.
 
If you buy 7 ropes, you get the 8th for free.  Use the coupon code 8FOR7 at the checkout.