Radians Lowset� 21 Earmuff has foam filled cushion padding on earcups along with evenly spread tension in the headband which allows for comfortable wear while wearing protective safety glasses. - Comfortable & lightweight hearing protection. - Low profile design. - Compact folding feature allows for easy storage and keeps particles out of the earcups. - Adjustable headband with side wire guides allows for optimum fit. - Padded moisture wiching headband moves moisture away while providing cool comfort. - NRR 21 dB