... 2,Thermal retentivity 3,Flame-retardance 4,Environment-protection Environmental--Sound-proof cotton 1,Technic It is made of 100% plyester ... and convenient decoration model. 2),Thermal retentivity: Special sound absorbing rules make the excellent thermal retentivity nature and ... stable temperature. 3),Flame-retardance: Plyester fiber fire-proof material, excellent flame-retardant nature, up to national ...