This is a Batt in a Braid: this series is a set of custom-designed blends made to be as complex as batts, but in "braid" form - hence the name :-)
It's easier to remember by number than by a whole string of ingredients ...
This is Batt in a Braid #54:
Bleached YAK/Polwarth / Mulberry Silk (40/40/20)
I take great care to make sure that dye is sufficiently exhausted and heat set the fibers so there is minimal to no run-off. However, due to differences in water across the globe, what runs clear for me may bleed a little for you. Please take care to hand wash your finished item in cool water and lay flat to dry. I also make every attempt possible to use a photograph that is as true as possible to the real color. Monitor settings may vary.