Harley Benton NeckWrap Small

I got small and medium size of those and I was surprised to see almost no size difference. They were both kind of small. They are very soft, which makes it difficult to mount on or to remove it quickly. They are black on the photos but what you cannot see on the photos is that they glitter if there is a direct light put on it. So, having it on stage will make it pretty visible. Some people will like this, some other like me - not so much.
The other product by GruvGear is made better but both of them are ridiculously overpriced.

It works okay, but on my 4 string, the middle strings are muted less, or not at all. It would need a stabilizer that make sure it puts equal amount of "touch" on all strings

It stops the strings above the nut from ringing. However most bass guitars have string trees on the headstock and therefore you need another string wrap. It would be better if two string wraps are sold together, one being smaller (just for 2 strings).

Bought it to mute my guitar strings while recording..
It does it job well and is fairly cheaper than competition..
However I am a bit disappointed with the quality of the materials.. only used it twice and already the place where the Velcro attaches is ungluing from the other fabric... Will try sewing it to make it last longer