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I know everyone knows this brush
Is an old version, maybe the first of their series and I bought it at least 4 years ago.
I can say that it is the softest things that you can probably touch it from a brush but I have to say that even with a really carefull wash...it started to loose some fibers in a very annoying way plus it`s stain so bad of black that I can`t believe it!
I won`t repurchase Sigma brushes ever again even if several gurus on YT said that they are the best well if you are looking for saving money yes..
* photos are mine please do not take without permission