I had two synthetic knots installed during a recent revamp service. The fibers are soft on the face, but scratchy enough to work well with a croap. There is also enough backbone so the knot doesn't flop around or bend too much as you apply the lather. I think they're excellent knots.

Hard to rate, never received it. It’s been a few weeks now and no replacement has been sent or refund offered.

Synthetic knot was used to restore old Made Rite brush. Knot fit was perfect and restored brush looks awesome!

I had this knot put into a Rubberset 400-3 as part of the brush refurbish service. It’s a great performer. It’s densley packed and retains heat well. There is plenty of backbone relative to the loft. It’s quickly becoming one of my favorite brushes.