Acoustic insulation,sound absorption,polyester cotton, polyester insulation is made of 100% high density fiber after hot- prossed to cotton shape. And we use different hot-press to reach different density and sure its ventilation, which makes it becomes excellent sound absorption and insulation products. It’s a kind of new developed product that with good soundproof effect and without harm to human being, which is better than glass fiber cotton. Polyester fiber acoustic cotton is widely used cinema, recording room, music studio, movie theater, personal studio, and other places where need high requirement about sound-absorption.