Earmuffs with ear cushions, filled with a unique combination of liquid and foam, which ensures optimum sealing with low pressure even when worn over a long period of time. Sealing rings have ventilation channels and are coated with soft, patented, hygienic foil. Wide space around the ears prevents excessive sweating, in order to increase comfort. Unique cocoon shape and stainless steel provide stability even when worn over a long period of time. Dual ear cushion design minimizes resonance, for maximum attenuation of high frequency sounds. High level of attenuation, SNR is 35 dB.