Earthwool Wall Batts come in different sizes and densities to accommodate for different commercial designs. Whether its creating a sound barrier in the office or workplace, or a thermal break from the harsh temperatures of North Queensland, Earthwool Wall Batts have a place in your special design. Made up of sand, which is one of the world’s most abundant resources, and up to 70% recycled glass, Earthwool Wall Batts are the most environmentally responsible insulation available.