What can he bring for you? 1.Sound insulation and noise reduction It absorbs and blocks noise through the internal sound insulation material layer, and has a good effect on medium and high-frequency noise (such as human voices and traffic sounds), and is suitable for positions such as walls and ceilings. 2.Thermal insulation and heat preservation The surface aluminum foil reflects thermal radiation, reduces heat loss, keeps the indoor temperature warm in winter, blocks the high temperature outside in summer, and improves energy utilization efficiency. 3.Moisture-proof and waterproof .