We are pioneer with this product in Second Life. Wear and wait to see how your eyebrow change the style and expression. But the best is into your head, disable the camera constraints in the advanced in the top menu (ctrl+alt to available advanced option), and look into your head, using this one, now you have a genuine brain.

*See the video on the link below
- Brain layer
- 6 Eyebrows Styles
- no prim no mesh, only layer