... muff is slotted type,with foam-filled cushions, protection against noise. safety working earmuff for helmetMaterial :ABS or HDPE, foamThis ear-muff could ... ear muff is slotted type,with foam-filled cushions, perfect protection against noise.package with head card carton size:53.5 ... .5cm/60pcs G./N.W.:14.8*16.8kgs this earmuff could set up to helmet,please see the picture as ...