May 13, 2026 Updated June 2, 2026 Steven Eaton

Moldex 6686 Glide Review — NRR 30 Jar Twist-In Foam Earplug, 50 pairs

Moldex 6686 Glide Jar Review: Is the 50-Pair Dispenser Jar the Right Format for Your Safety Supply Point?

The Moldex 6686 Glide Jar packages 50 pairs of Glide NRR 30 twist-in foam earplugs in a countertop-ready dispenser jar. Identical foam, NRR, and NIOSH approval as the individually wrapped 6940 Glide — the jar format is purely a packaging and dispensing decision. Jar-format earplugs are the standard for workstation safety supply points, toolroom dispensers, and high-traffic safety checkpoints where workers self-serve.

Editorial Verdict — Moldex 6686 Glide Jar: 4.5/5
Best format for fixed-location safety supply stations. Lower per-pair cost than individually wrapped boxes for high-volume programs. Countertop jar reduces waste vs. individual packaging. Same NRR 30 twist-in protection as 6940/6945.

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Specifications

Feature	Details
Model	6686
NRR	30
Insertion Type	Twist-in (no rolling required)
Format	50-pair countertop dispenser jar
NIOSH Approval	29 CFR Part 11.57
Effective Protection	11.5 dB(A) per OSHA method

Jar Format vs. Boxed Pairs: Program Management Considerations

Consideration	Jar (6686) vs. Boxed pairs (6940)
Per-pair cost	Lower for jar format at scale
Individual packaging waste	Jar: minimal; Box: each pair in poly bag
Best deployment	Workstation jars, checkpoints, safety shacks

Jar-format earplugs work best at fixed locations: machine operator workstations, facility entrances to noisy areas, tool cribs, and safety kiosks. For workers who carry earplugs on their person throughout a shift, individually wrapped pairs are more practical.

Maintaining Jar Dispenser Hygiene

Clean dispenser jar weekly with mild soap and water; dry thoroughly before refilling
Never mix old and new earplugs in the same jar — refill completely when jar is empty
Inspect jar contents periodically for contamination, moisture, or degraded foam
Label jars with earplug model and NRR for compliance documentation
Position dispensers in locations that minimize exposure to process chemical vapors which can degrade foam or contaminate canal-contact surfaces

OSHA Hearing Conservation Requirements: When Are Earplugs Mandatory?

OSHA 29 CFR 1910.95 (General Industry) requires employers to take action when workers are exposed to noise at or above specific thresholds:

Noise Level (TWA)	Required Action
85 dB(A) or above	Action Level: Establish Hearing Conservation Program; provide hearing protection; audiometric testing
90 dB(A) or above	PEL: Engineering/administrative controls required first; hearing protection mandatory
100 dB(A) or above	2-hour daily limit without protection; must use hearing protection
115 dB(A) or above	15-minute limit; double protection often required

The action level (85 dB(A)) triggers the full hearing conservation program requirement: noise exposure monitoring, baseline and annual audiometric testing, hearing protection provision, employee training, and recordkeeping. Many employers issue hearing protection to all workers in any area above 85 dB(A) regardless of measured TWA.

Understanding NRR: The Noise Reduction Rating Explained

Every NIOSH-approved earplug carries an NRR — the Noise Reduction Rating tested per ANSI S12.6 Method A (experimenter-supervised fit). Understanding how NRR translates to real-world protection is critical for compliance:

OSHA method (50% derating): Effective dB = (NRR − 7) ÷ 2. For NRR 30: (30 − 7) ÷ 2 = 11.5 dB effective attenuation
NIOSH method (75% derating for foams): Even more conservative — NIOSH recommends assuming only 25% of labeled NRR in real programs
Maximum TWA with NRR 30 (OSHA method): 90 dB(A) PEL + 11.5 dB = 101.5 dB(A). At exposures above 101.5 dB(A), NRR 30 alone is insufficient; double protection or higher-NRR devices are needed

The gap between labeled NRR and real-world protection exists because laboratory testing uses trained subjects and careful supervised insertion. In the field, workers insert earplugs quickly, sometimes in poor light, without supervision — resulting in significantly less attenuation than the label suggests. This is why NIOSH derates foam earplugs more aggressively than other protection types.

Hearing Conservation Program: What OSHA Requires Beyond Just Providing Earplugs

Simply handing out earplugs does not satisfy OSHA 1910.95. A compliant Hearing Conservation Program requires:

Noise monitoring: Initial survey to identify exposures above 85 dB(A); remeasure when operations change significantly
Audiometric testing: Baseline within 6 months of hire for noise-exposed workers; annual retest; professional review of test results; follow-up when Standard Threshold Shift (STS) is detected
Hearing protection selection: Provide at least two types of hearing protection; ensure adequate attenuation for measured exposures using NRR calculations; replace worn or damaged devices
Training: Annual training on effects of noise on hearing, purpose of audiometric testing, use and care of hearing protection
Recordkeeping: Audiograms retained for duration of employment; noise measurement records retained 2 years; audiogram records retained 2 years

Browse all Moldex earplugs or see the full earplug selection at WC Safety including foam, banded, and reusable options.

Frequently Asked Questions

Q: Is the 6686 Glide Jar the same earplug as the 6940 Glide?

A: Yes — identical foam, identical NRR 30, identical NIOSH approval, identical twist-in insertion. The difference is packaging format: 6686 is 50 pairs in a countertop dispenser jar; 6940 is 100 pairs in individually wrapped poly bags.

Q: How many earplugs does the 6686 jar hold?

A: 50 pairs (100 individual earplugs) per jar.

Q: Is jar format cheaper per pair than boxed?

A: Generally yes — jar-format earplugs typically cost less per pair than individually wrapped at comparable quantities because individual packaging material and labor are eliminated. Compare current pricing at your distributor.

Q: What is the best way to deploy jar-format earplugs in a facility?

A: Place jars at the entrance to all areas exceeding 85 dB(A); mount on wall brackets or countertops at a height accessible to all workers; label with NRR and proper use instructions; check and refill weekly.

Q: Are earplugs from a shared jar sanitary?

A: Workers self-serve from the jar, taking pairs without touching remaining earplugs. The sanitation concern is: (1) workers should have clean hands before taking earplugs; (2) dirty earplugs should never be returned to the jar; (3) jars should be cleaned regularly. Some programs use individually capped dispenser tubes within the jar for added sanitation.

Q: What is NRR 30 effective protection in dB(A)?

A: OSHA formula: (NRR−7)÷2 = (30−7)÷2 = 11.5 dB(A). Maximum protective use level with NRR 30 (OSHA method): 90 + 11.5 = 101.5 dB(A) TWA.

Q: When should I choose jar format over individual pairs?

A: Choose jar format for: high-volume dispenser points (dozens of workers per shift), workstation-based dispense programs, reduction of per-pair waste. Choose individual pairs for: pocket/belt carry, PPE vending machines, visitor programs, and situations where individually trackable issued PPE is required.

Q: Does the jar dispenser lid seal the earplugs from environmental contamination?

A: The dispenser jar lid provides basic protection from dust and chemical vapors when closed. In environments with significant solvent vapor, keep jars closed when not in use. Earplugs that have absorbed chemical vapors from the environment should be discarded.

Q: Can this earplug be used with a hard hat?

A: Yes — foam earplugs have no interference with hard hats or brimmed headgear. Earmuffs can be compromised by hard hat suspension interference; foam earplugs are the better choice when hard hats are required.

Q: Are Moldex 6686 earplugs NIOSH-approved?

A: Yes — NIOSH-approved under 29 CFR Part 11.57. The Moldex NIOSH TC approval number is on the product packaging.

Q: What is a hearing conservation program and is it required for my facility?

A: A Hearing Conservation Program (HCP) per OSHA 1910.95 is required when any worker is exposed to noise at or above 85 dB(A) TWA. Required elements: noise monitoring, audiometric testing, hearing protection provision, training, recordkeeping. Failure to maintain an HCP for noise-exposed workers is an OSHA violation.

Q: Are Moldex earplugs BPA-free?

A: Moldex uses polyurethane foam — not polycarbonate or other BPA-containing plastics. Contact Moldex directly for specific material certifications for regulated environments.

Q: How often should jar dispensers be refilled?

A: Check and refill at minimum weekly in high-use areas. In facilities where dozens of workers take earplugs per shift, daily refill checks may be needed. Track consumption as part of your HCP documentation.

Q: Can earplugs be provided in OSHA-mandated programs at no cost to employees?

A: Yes — OSHA 1910.95(i) requires employers to provide hearing protection at no cost to employees whose TWA exposures are at or above the action level of 85 dB(A).

Q: Where can I buy Moldex 6686 Glide Jar?

A: Available at WC Safety. Browse all Moldex earplug formats including corded, uncorded, and jar options.

Noise-Induced Hearing Loss: What Workers and Safety Managers Must Know

Noise-induced hearing loss (NIHL) is the most prevalent occupational illness in the United States. NIOSH estimates that approximately 22 million US workers are exposed to hazardous noise annually. NIHL is:

Permanent: Unlike some occupational diseases, NIHL cannot be reversed. Hair cells in the cochlea, once damaged, do not regenerate. This is why prevention is the only effective strategy.
Progressive: Hearing loss accumulates over years of exposure. Workers may not notice significant hearing difficulty until their late career, when damage has been accumulating for decades.
Preventable: With consistent use of properly rated hearing protection and engineering controls, NIHL is almost entirely preventable. The technology and products exist — compliance is the variable.
High-frequency first: Early NIHL characteristically affects the 3000-4000 Hz range — the frequencies most important for understanding speech consonants. Workers notice they can "hear" people speaking but cannot understand them clearly. This "cookie bite" pattern on audiogram is a warning sign of noise damage.

The audiometric testing required by OSHA 1910.95 is specifically designed to detect this pattern early — when intervention (better hearing protection, reduced exposure) can prevent further loss. A Standard Threshold Shift (STS) detected on audiogram is a mandatory trigger for program review and protective action under OSHA requirements.

Double Hearing Protection: When NRR 30 Is Not Enough

For extremely loud environments (above 103 dB(A) TWA), even NRR 33 earplugs may be insufficient as sole protection. OSHA and NIOSH recommend dual hearing protection — wearing both earplugs and earmuffs simultaneously — when:

Measured TWA exceeds 105 dB(A)
Impulse peak levels exceed 140 dB(P)
Engineering controls have reduced noise to the extent feasible but residual exposure remains above 103 dB(A)

Combined NRR for dual protection is NOT the sum of both NRR values. The combination adds approximately 5 dB of protection beyond the higher-rated device alone. For NRR 30 earplugs + NRR 25 earmuffs: effective protection ≈ 13 + 5 = 18 dB (OSHA method). Select the combination that brings effective exposure below 90 dB(A).

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Disclosures & editorial standards
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Safety equipment selection is governed by applicable OSHA standards and your facility's safety program.

Filed in: earplug, glide, hearing protection, moldex, nrr 30, osha 1910.95, product review

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