+1
My DIY panels are frames filled with rockwood/OC703 , wrapped with black weed barrier cloth (very cheap, porous for sound, yet holds all the dust associated with the rockwool/OC703, this may be overkill, but gives piece of mind), then cosmetically fronted with frames of stretched Burlap…the burlap could be replaced with lots of different fabric. The burlap gave me a neutral look at an agreeable cost.