Havelock Wool acoustic panels vs fiberglass/Rockwool

Is there a concern about the rockwool or other insulation being breathed in?  Are you not double covering the panels?  I used white batting and then guilford of Maine for my first reflections.  I can't see any insulation particles making its way through two layers of thick fabric.  What is the concern here?  Should I be concerned as my room probably has hundreds of pounds of insulation in here lol.  The way I understand it, is unless the panels are disturbed or aren't covered, there is no real risk?  I do like the fact that this isn't some synthetic stuff though made in a factory

Seems like a no-brainer.  Six panels for $200 ... Thanks for sharing!

@ditusa 

I am not attempting to reinvent the wheel, just add a little bit of room reflection control to a lively space as safely as possible.  Dennis has his followers, as do many acoustic gurus.  

They even have a van insulating kit for those of us still selling speakers out the back of a van. 

They even have a van insulating kit for those of us still selling speakers out the back of a van. 

Another option is recycled denim/cotton like echo verb or soundproof cow. Moo.

In theory broad band panels are generally more effective. You may want to experiment doubling them up or have them offset from the wall/ceiling to maximize midrange absorption.  

@ditusa 

I used Rockwool panels when I put my audio room together.  Had I known about this wool based product I suspect I would have gone with it instead given its superior performance (if their data is accurate)  Price does not seem that unreasonable--less than $200 for six 2inch 2x4 panels.  

Nice find!

(where are they getting all those sheep???????)

Interesting, and no @ditusa , it is not rock wool. It looks like it could get a little spendy though.