Polyester insulation batts is one of our product and It's grey.Polyester insulation batts is mainly used for ceiling insulation.The Polyester insulation batts are made of 100% polyester fiber by thermal bonded process. As substitution of others, it is cheaper ,lightly and more environmental friendly.And it can help households reduce their energy use, cut their power bills ,and increase the comfort and value of their homes. Features: 1. Superior sound, heat insulation capacity are the main advantages of this Insulation batts 2. Environmental friendly, complying with ROHS, REACH ,OEKO-TEX 100 environmental standard. 3. the Polyester insulation batts are no harm to human body. Anti pest, anti-static 4. These Insulation batts are with long-lasting resilience and loft and fire proof.