MOS Reference: Passive over-ear hearing protection earmuffs with foam-filled cushions and padded headband for comfortable all-day wear. Wide, soft ear cushions distribute pressure evenly and create an effective acoustic seal around the entire ear. Adjustable stainless steel headband fits a wide range of head sizes. Compact folding design allows easy storage in toolboxes and gear bags. Available in multiple NRR ratings to match the noise level of your work environment. Compatible with most hard hats via slot-adapter kit (sold separately).