Product typeblackout clothTypeacoustic clothMaterial100% cottonColorBlackWidth3 mWeighted sound absorption coefficient (ISO 11654)w : 0,70 nature / 0.60 blackSOUND Reduction Coefficient NRC (ASTM C423)0,65 nature / 0,60 blackWeight500 g/m2, 1,5 kgOther featuresFlame resistant (B1)