3M 1440 Ear Muffs 8-pack Lightweight (8 ounces), soft padded headband for extra comfort, multi-position ear cups. Recommended for moderate noise (up to 95 dBA TWA). Noise Reduction Rating (NRR)*: 24 dB. Molded inserts provide large space for the ear & good fit. Soft, foam-filled cushions stay soft. 2-point mounting headband for low evenly distributed pressure and easy handling. Replacement cushions and inserts available (replacement parts kit 1442).