CASH10P3E / H10P3E EARMUFF HEARING PROTECTOR CAP H10P3E Twin Cup Muff Dual shell cup absorbs sounds, minimizes resonance and doesn't inhibit clarity of speech. Can be put in rest, usage and storage positions. Adapts to fit many slotted hard hats. Replaceable ear cushions. Weighs 10.4 oz. In compliance with ANSI S3.19-1974 and CSA Z94.2-M1984 Class AL. NRR 27. Made in USA.