The 3M™ E-A-R™ Classic™ Uncorded Earplugs (312-1201) deliver trusted, economical hearing protection with a legacy of performance in noisy industrial environments. Constructed from slow-recovery, moisture-resistant foam, these disposable earplugs gently expand to fit the unique shape of the ear canal, forming a secure acoustic seal. Their cylindrical shape helps ensure consistent protection for most wearers while allowing for easy insertion and removal. Recognized for their reliability and consistent attenuation, these earplugs remain one of the most widely used solutions in occupational hearing conservation programs.

Key Features

High Noise Reduction Rating: Offers a Noise Reduction Rating (NRR) of 29 dB to help protect against hazardous sound exposure up to 101 dBA.
CSA Class AL Certified: Complies with Canadian safety standards for industrial hearing protection.
Slow-Recovery Foam: Expands gradually in the ear canal to create a snug, comfortable fit that adapts to most ear sizes.
Cylindrical Shape: Helps maintain consistent insertion depth and reliable noise sealing.
Moisture Resistant : Resists moisture for improved performance in humid or sweaty conditions.
Disposable and Hygienic : Designed for single-use; helps reduce cross-contamination in shared PPE environments.
E-A-Rfit™ Compatible : Can be validated for fit using the 3M™ E-A-Rfit™ Dual-Ear Validation System.

Intended Use

Ideal for professionals exposed to continuous, high-level noise in environments such as metal fabrication, construction, mining, automotive, pharmaceuticals, oil & gas, and general manufacturing. Recommended for use during grinding, sanding, painting, welding, blasting, machine operation, and other high-decibel tasks.

Product Specifications

Product Number: 312-1201
3M ID / SAP ID: 7000002300
Legacy SKU: 70071514932
Style: Uncorded, roll-down foam
Material: Slow-recovery polyurethane foam
Shape: Cylinder
Color: Yellow
Corded: No
Metal Detectable: No
Moisture Resistant: Yes
Reusable: No (single-use)
Roll-Down Required: Yes
Fit Verification: Compatible with 3M™ E-A-Rfit™
NRR: 29 dB
Packaging: 200 pairs per box

Certifications and Standards

CSA Class AL – Certified for use in Canada for Class A hearing protection
ANSI S3.19-1974 – Meets U.S. standard for hearing protector attenuation evaluation
NRR 29 dB – Rated noise reduction when properly inserted