PU earmuffs with a polypropylene headband that can be worn under the chin._x000D_Ideal for periodic or occasional use._x000D__x000D_Composition:_x000D_Polyurethane foam._x000D_Polypropylene head mount._x000D__x000D_Average noise attenuation: SNR 28 dB_x000D_High frequency attenuation: H 29_x000D_Mid frequency attenuation: M 24_x000D_Low frequency attenuation: L 22_x000D_Sizes / Dimensions: Ø 8- 18 mm