Product Type : Earmuff Foam : PU Support type : Over-the-head Support material : ABS Support benefits : Adjustable height – Left/right position Cushions : PU foam Cup : ABS SNR (dB) : 23 Noise reduction dB (HML) : H – M – L H : 24 M : 20 L : 14 RSE : Recyclable Weight (g) : 155 Size : Unique size