OK, I tried most of the reasonable searches for "natural acoustics" and haven't found this yet. Link please.
Natural Acoustics sound panels
Natural Acoustics sound panels and bass panels. I only found them by complete accident typing in natural fibers. Their offerings are very reasonable and come in numorous colors. Have any here bought their panels? There made using natural fibers such as cotton and denim.They also sell mounting brackets made of natural pine wood.