ProSo-Pet™ Is our latest series of environmentally frendly acoustic products. ProSoCoustic ProSo-PET panels provide superior absorption, sustainability, and safety, empowering studio owners, commercial space operators, and homeowners to control and tame room acoustics better, without risking safety or contributing to environmental waste. Made from 100% recycled PET — the plastic used in water and soda bottles — ProSoCoustic ProSo-PET panels are an earth-friendly, safer-for-you alternative to old-fashioned foam or fiberglass panels.