The X-Series earmuffs are 3M"s latest advancement in hearing conservation. New technologies in comfort, design and protection all come together in this groundbreaking earmuff line. The X3P3E utilizes a newly designed spacer to help improve attenuation without the need for a much larger cup or double cup design. This lightweight earmuff is designed for protection against high-level industrial noise and other loud sounds. Noise Reduction Rating (NRR)a 25 dB. CSA Class AL. The NRR may overestimate the hearing protection provided during typical use. Hearing protection solutions made innovatively easy. The 3M Peltor X series earmuffs are ideal for protection against noise arising from a wide range of applications in the workplace and leisure activity. Examples of typical applications include: metal processing, automotive, airports, construction, textile manufacturing, chemical and pharmaceutical, manufacturing, cement manufacturing, printing, woodworking, heavy engineering, foundry, steelworks, mining and quarrying. Headband and headband cover/sleeve: stainless steel wire, TPE, polyester, polypropylene, acetal. Hard hat attachment arm: stainless steel wire, acetal, polyamide. Earcups: ABS/TPU. Earcup inserts: PU foam. Earcup cushions and cushion covers: PU foam and PVC. Black/red color. Hearing protection style: hard hat attached. Noise reduction rating: 25 decibel. Product type: earmuffs. Size: one size fits most.