3M Foam Ear Plug: Class A(L)

• Noise Reduction Rating (NRR) of 29 dB
• CSA Certification: Class AL
• Test compatible with 3M™ E-A-Rfit Validation System
• 3M™ Foam 1100 series Earplugs feature soft, hypoallergenic foam and a tapered design to fit comfortably in the ear canal.
• The slow-recovery polyurethane foam conforms to the shape of the ear canal to help create a comfortable noise barrier.

*The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.