... retentivity 3,Flame-retardance 4,Environment-protection Environmental--Sound-proof cotton 1,Technic It is made of 100% ... space with stable temperature. 3),Flame-retardance: Plyester fiber fire-proof material, excellent flame-retardant nature, up to national grade ... B1 fire-proof inspection report. 4),Environment-protection: Plyester fiber is close ...