May 13, 2026 Updated June 2, 2026 Steven Eaton

Moldex 6687 Glide Camo Review — NRR 30 Jar Twist-In Foam Earplug, 50 pairs

Moldex 6687 Glide Camo Jar Review: Best Jar-Format Earplug for Outdoor and Construction Safety Supply Stations?

The Moldex 6687 Glide Camo Jar packages 50 pairs of Glide Camo NRR 30 twist-in foam earplugs in a countertop dispenser jar — the same earplug as the 6941 and 6946 Glide Camo variants, in jar-dispensing format. The jar format reduces per-pair cost, eliminates individual packaging waste, and suits fixed safety supply points. The camouflage pattern provides the compliance advantage of the Camo line in a high-volume dispenser format for construction site shacks, outdoor facilities, and heavy equipment operations.

Editorial Verdict — Moldex 6687 Glide Camo Jar: 4.4/5
Ideal for high-volume outdoor/construction safety supply stations where camo aesthetics improve worker compliance. Same NRR 30 twist-in protection as 6941/6946, in cost-effective jar format.

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Specifications

Feature	Details
Model	6687
NRR	30
Insertion	Twist-in (no rolling required)
Format	50-pair jar
Color	Camouflage
NIOSH Approval	29 CFR Part 11.57

Jar Format at Outdoor and Construction Sites

Jar-format earplugs in construction site safety shacks, outdoor maintenance toolrooms, and equipment yards face unique challenges compared to indoor industrial facilities:

Protect jar from weather exposure — UV degrades foam over time; keep jar indoors or in covered area
Dust and particulates at outdoor sites can contaminate open jars — keep lid closed when not in use
Temperature extremes (hot/cold) affect foam characteristics — earplugs stored in vehicle cabs or outdoor boxes may be affected by heat in summer. Check foam resilience before use.
Track consumption — outdoor programs often have less oversight than indoor; periodic audits of jar refill frequency help document active earplug provision

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 6687 Glide Camo Jar the same earplug as 6941/6946 in jar format?

A: Yes — identical NRR 30, twist-in insertion, NIOSH approval. Jar vs. individually wrapped is a packaging format choice only.

Q: How many pairs fit in the 6687 jar?

A: 50 pairs (100 individual earplugs).

Q: Is the camo jar available to refill with bulk earplugs?

A: No — Moldex jars come pre-filled and are not designed for customer refilling. When the jar is empty, replace with a new 6687 jar or refillable standard jar with 6687 earplugs purchased in bulk.

Q: What construction noise levels require NRR 30?

A: OSHA 1926.52 (Construction) requires hearing protection at or above 90 dB(A) TWA. Common construction noise: excavators 85-95 dB(A); concrete saws 100-110 dB(A); jackhammers 100-115 dB(A); nail guns 95-110 dB(A). NRR 30 is effective up to 101.5 dB(A) TWA (OSHA method).

Q: Are construction workers required to have a hearing conservation program?

A: Construction is governed by OSHA 1926.52, which requires hearing protection and exposure monitoring when exposures reach 90 dB(A) TWA. OSHA 1926.52 has a less comprehensive audiometric testing requirement than general industry 1910.95 — consult your safety manager for current construction hearing conservation requirements.

Q: Can the jar be mounted on a wall?

A: The standard Moldex jar dispenser is a countertop unit. Wall-mount dispensers for earplug jars are available from third-party safety supply vendors — check for compatibility with Moldex jar diameter.

Q: What is the shelf life of earplugs in the jar format?

A: Moldex foam earplugs have a 5-year shelf life from manufacture date when stored properly. In an open jar at a worksite, environmental factors (UV, temperature, chemical vapors) can shorten practical service life. Earplugs that feel stiff, crumbly, or no longer spring back should be discarded and jar refilled.

Q: Does the camo color help with safety visibility?

A: No — camo is intentionally designed to reduce visibility, which is the opposite of safety-oriented high-visibility coloring. Camo earplugs are a compliance appeal choice, not a visibility safety choice. High-visibility earplugs (bright colors) are available if detection of dropped earplugs in machinery or product is a priority.

Q: Do outdoor workers need hearing protection from wind noise?

A: Wind noise at typical working conditions (up to 30 mph) is generally below OSHA action levels. Wind noise becomes a factor at very high wind speeds (above 50 mph) during specific operations. Industrial noise from outdoor equipment (generators, saws, heavy equipment) remains the primary hearing conservation concern for outdoor workers.

Q: What is the OSHA standard for construction hearing protection?

A: 29 CFR 1926.52 — Occupational Noise Exposure. Hearing protection is required when noise exposures equal or exceed 90 dB(A) TWA. Engineering and administrative controls should be implemented when feasible; hearing protection is supplementary.

Q: Can I use the Glide Camo Jar for a shooting range?

A: Shooting ranges are high-impulse noise environments (140+ dB peak for rifle fire). NRR 30 foam earplugs provide significant impulse noise attenuation. For shooting range operators and frequent shooters, NRR 33 earplugs or double protection (earplugs + earmuffs) is more appropriate.

Q: Are there OSHA-approved brands of earplugs I must use?

A: OSHA does not approve specific earplug brands. The requirement is that hearing protection must be adequate to reduce employee noise exposure to acceptable levels. Any NIOSH-approved earplug with sufficient NRR for the specific exposure level meets OSHA requirements. Moldex 6687 is NIOSH-approved.

Q: What is the difference between impulse noise and continuous noise protection?

A: NRR ratings are based on continuous noise testing (ANSI S12.6). Impulse noise (gunfire, explosions) has different physics — peak pressure levels differ from TWA. NRR 30 provides strong attenuation for both, but impulse noise environments may warrant double protection or higher-NRR devices for peak exposure management.

Q: Where can I buy the Moldex 6687 Glide Camo Jar?

A: At WC Safety. Browse all Moldex earplug formats.

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).

Q: How do I train workers on OSHA-compliant earplug insertion?

A: OSHA 1910.95(k)(3)(i) requires training on proper use and care of hearing protectors. Effective training includes: demonstration of correct insertion technique; each worker demonstrating insertion to a trainer; feedback on insertion depth and fit check; annual refresher. Video training alone (without return demonstration) is insufficient for earplug training.

Q: What is the OSHA requirement for offering earplug types?

A: OSHA 1910.95(i)(3) requires employers to provide a variety of hearing protectors, not just one type. Workers must be allowed to select from at least two options adequate for their exposure. Offering camo alongside standard-color earplugs can satisfy the "variety" requirement while improving compliance.

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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 camo, hearing protection, moldex, nrr 30, osha 1910.95, product review

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