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Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
May 13, 2026 Updated July 25, 2026 Steven Eaton

Moldex 6940 Glide Review — NRR 30 Uncorded Twist-In Foam Earplug, 100 pairs

WC Safety Editorial Verdict: 4.5/5

WC Safety Editorial Verdict — 4.5/5. The Moldex 6940 Glide is the strongest pick when worker rolling technique is your program's weak point: its twist-in foam removes the under-rolling error that quietly destroys real-world attenuation, and the NRR 30 rating leaves a comfortable margin under OSHA's (NRR-7)/2 derating. We mark it down slightly only because uncorded single-use plugs cost more per shift than corded or reusable options and offer no metal-detectable variant for food and pharma lines — if you need either, weigh the corded SparkPlugs or reusable flanged plugs instead. See how its NRR converts to field protection in our NRR explainer.

Moldex 6940 Glide Review: Does No-Roll Twist-In Insertion Make the Difference in Your Hearing Conservation Program?

The Moldex 6940 Glide is an NRR 30 disposable foam earplug with a distinctive twist-in insertion system that eliminates the roll-before-insert step required by traditional foam earplugs. The smooth, tapered polyurethane foam surface allows a gentle twisting motion to insert the plug directly into the ear canal — addressing the #1 failure mode in foam earplug programs: under-rolling leading to shallow insertion and dramatically reduced protection.

Editorial Verdict — Moldex 6940 Glide: 4.6/5
Best twist-in foam earplug for programs where proper rolling technique is a compliance challenge. Eliminates the most common insertion error. Preferred for food, pharmaceutical, and cleanroom environments where rolling earplugs with bare hands raises contamination concerns.

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Specifications

Feature Details
Model 6940
NRR 30
Insertion Type Twist-in (no rolling required)
Corded No (uncorded)
Package Count 100 pairs
NIOSH Approval 29 CFR Part 11.57
Made In USA — Covina, CA
Effective Protection 11.5 dB(A) per OSHA 50% derating

Twist-In Insertion: Why Elimination of Rolling Matters

Traditional foam earplugs require rolling into a tight cylinder before insertion. Workers in a hurry, in cold temperatures, or in environments where glove removal is inconvenient often under-roll — inserting a partially expanded plug that sits shallower in the canal and provides much less than labeled NRR. Studies of real-world earplug use show some workers achieve as little as 5-8 dB of protection with NRR 33 foam earplugs due to improper insertion.

The Glide's smooth tapered surface can be inserted with a gentle rotation without any preliminary rolling. Inserting a Glide with proper twist-in technique consistently achieves deeper canal insertion than even correct roll-and-insert technique in many users. Industrial hygiene professionals increasingly favor twist-in designs for programs where training compliance with rolling technique has been chronically difficult.

Food, Pharmaceutical, and Cleanroom Advantage

In food processing, pharmaceutical manufacturing, and cleanroom environments, rolling foam earplugs with bare hands creates a hygiene issue — the act of rolling concentrates skin oils and any residual contamination onto the earplug surface that then contacts the ear canal. Glide earplugs minimize hand-contact with the foam surface during insertion, reducing this concern. Many food safety programs have specifically adopted Glide-type earplugs for this reason.

Glide vs. Glide Corded vs. Glide Jar

Model Description
6940 Glide (this) 100 pairs, uncorded, individually wrapped
6945 Glide Corded 100 pairs, with connecting cord
6686 Glide Jar 50 pairs in dispenser jar

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.

Foam Earplug Insertion Technique: The Difference Between Full and Half Protection

Improper insertion is the single largest cause of earplug underprotection in hearing conservation programs. Studies have shown that workers who believe they are properly wearing foam earplugs often achieve only 50-60% of labeled NRR. Proper technique:

  • Step 1 — Clean hands: Dirty hands introduce bacteria into the ear canal; always insert with clean hands
  • Step 2 — Roll (for roll-and-insert types): Roll the earplug into a tight, thin cylinder — tighter is better for deep insertion and proper expansion
  • Step 3 — Pull the ear: Reach over your head with the opposite hand and pull the top of your ear back and upward; this straightens the ear canal for deeper, more sealed insertion
  • Step 4 — Insert deeply: Insert the rolled earplug deep enough that the end sits at or below the ear canal entrance; deep insertion is critical for achieving labeled NRR
  • Step 5 — Hold: Keep holding the earplug in place for 20-30 seconds while the foam expands and fills the canal
  • Step 6 — Check fit: Cup both hands over your ears and release — properly seated earplugs will produce a noticeable hollow, muffled sound change. If you hear little difference, reinsert

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: What makes the Glide different from standard foam earplugs?

A: The Glide uses a smooth, tapered polyurethane foam that allows direct twist-in insertion without rolling. This eliminates the #1 earplug failure mode — under-rolling leading to shallow insertion. For programs where workers rush insertion or wear gloves that make rolling difficult, Glide earplugs consistently achieve better real-world protection.

Q: What is NRR 30 and how much protection does it provide?

A: NRR 30 provides 11.5 dB(A) effective attenuation (OSHA 50% derating: (30−7)÷2 = 11.5). Workers at 100 dB(A) have an effective exposure of 88.5 dB(A). Maximum use level with NRR 30: 101.5 dB(A) TWA (OSHA method). For higher exposures, upgrade to NRR 33 or use double protection.

Q: Are Moldex 6940 Glide earplugs NIOSH-approved?

A: Yes — NIOSH-approved under 29 CFR Part 11.57. NRR 30 rating is the EPA-registered NIOSH-tested value. Made in Covina, California.

Q: Is the 6940 Glide the same earplug as the 6945 Glide Corded?

A: Same foam, same NRR 30, same twist-in insertion. Only difference: 6945 has a cord connecting both earplugs. Choose corded (6945) when loss prevention or brief-removal hang-around-neck convenience is valued. Choose uncorded (6940) when cord-free wear is preferred.

Q: Can I use the Glide in a food processing environment?

A: Yes — the Glide is preferred for food processing over roll-and-insert types because the twist-in action minimizes direct hand-to-foam contact during insertion. This aligns with food safety programs that require minimizing contamination vectors.

Q: Do Moldex Glide earplugs work for sleeping or travel noise?

A: Foam earplugs including the Glide are frequently used for sleep and travel noise reduction. NRR 30 provides significant noise reduction for snoring, traffic, and airplane cabin noise. For sleep use, a softer, lower-pressure earplug may be more comfortable — the Mellows thermosensitive foam may be worth considering for overnight use.

Q: What happens if I over-insert a foam earplug?

A: Deep insertion (to the level of the ear canal, not the outer ear) is correct and desired for maximum attenuation. Foam earplugs cannot physically be inserted so far that they damage the eardrum under normal insertion pressure. If an earplug feels "too deep" and uncomfortable, it may simply mean the canal has a curve — adjust insertion angle.

Q: How do I remove foam earplugs properly?

A: Twist gently while pulling outward — the same direction as insertion, reversed. Yanking an expanded earplug straight out can cause discomfort or, rarely, slight temporary pressure change. Twisting breaks the seal gradually for more comfortable removal.

Q: Does the Glide require a prescription or fit testing?

A: No — disposable foam earplugs do not require individual fit testing in the same way respirators do. However, OSHA 1910.95 requires employers to verify that the selected hearing protector provides adequate attenuation for the specific noise exposure. Workers should receive training on proper insertion technique to achieve the labeled NRR.

Q: Can the Glide be used in construction under 29 CFR 1926.52?

A: Yes — the Moldex 6940 Glide meets NIOSH requirements applicable to both general industry (1910.95) and construction (1926.52) hearing conservation requirements.

Q: What is the OSHA action level for noise?

A: 85 dB(A) time-weighted average (TWA) over an 8-hour shift. At or above 85 dB(A), OSHA requires implementing a Hearing Conservation Program. The PEL is 90 dB(A) TWA — above the PEL, engineering controls must be attempted before relying solely on hearing protection.

Q: Are there smaller or larger Glide sizes?

A: Standard Glide earplugs fit most adult ear canals. Moldex offers other earplug sizes in some product lines. If standard foam earplugs are uncomfortable, consider pre-molded earplugs with multiple sizing options, or earmuffs.

Q: How are earplugs disposed of properly?

A: Disposable foam earplugs used in non-hazardous environments go in general solid waste. If used in environments with hazardous materials (lead, asbestos, chemical contamination), consult your safety manager — contaminated PPE may require disposal as hazardous waste.

Q: Is the Glide appropriate for construction with pneumatic tools?

A: Pneumatic tools (nail guns, jackhammers, concrete saws) typically produce 100-115 dB(A). NRR 30 Glide earplugs provide protection up to 101.5 dB(A) (OSHA method). For heavy pneumatic tool use above 102 dB(A), consider double protection (earplugs + earmuffs) or higher-NRR devices.

Q: Where can I buy Moldex 6940 Glide earplugs?

A: Available at WC Safety. Browse all Moldex earplugs including corded, jar, and camo variants.

Q: Does Moldex manufacture Glide earplugs in the USA?

A: Yes — all Moldex earplugs including the 6940 Glide are manufactured in Covina, California. NIOSH approval is issued to the Moldex USA manufacturing facility.

Q: What is the frequency at which foam earplugs provide the most attenuation?

A: Foam earplugs provide the most attenuation at high frequencies (2,000–8,000 Hz). Mid-frequency (500–2,000 Hz) attenuation is also good. Low-frequency attenuation (below 250 Hz) is the weakest for all earplug types. For environments dominated by low-frequency noise (diesel engines, HVAC), consult your industrial hygienist for appropriate protection.

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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.

Pros & Cons

Pros
  • Twist-in design eliminates the roll-down step, removing the #1 cause of failed foam-earplug fit (under-rolling and shallow insertion)
  • NRR 30 leaves a usable margin even after OSHA's (NRR-7)/2 derating (~11.5 dB(A) estimated field protection)
  • No bare-hand rolling means cleaner insertion for food, pharmaceutical, and cleanroom settings
  • Tapered polyurethane foam is smooth and slow-recovery for a comfortable seal across most ear-canal sizes
  • 100-pair bulk pack lowers per-pair cost for high-headcount hearing conservation programs
  • USA-made (Covina, CA) with NIOSH approval under 29 CFR Part 11
Cons
  • Uncorded — no cord to retrieve plugs or keep a pair handy between exposures, so loss/replacement cost runs higher
  • Single-use disposable; more costly per shift than corded or reusable flanged plugs over time
  • This 6940 SKU is not metal-detectable, so it is unsuitable for food/pharma areas requiring detectable PPE
  • NRR 30 sits just below the highest-attenuation foam plugs (NRR 33), a small disadvantage for extreme-noise tasks
  • Twist-in technique still requires pulling the ear up-and-back; a careless insert can still seat shallow

Who It's For

Buy it if:

  • Hearing conservation managers whose biggest compliance gap is workers under-rolling traditional foam plugs
  • Food, pharmaceutical, and cleanroom operations that want to avoid bare-hand rolling for contamination control
  • High-volume worksites buying in 100-pair bulk that prefer a forgiving, low-training insertion
  • Workers in 85-100 dBA environments who want reliable NRR 30 protection without precise rolling skill
  • Anyone new to foam earplugs who struggles to get a deep, consistent seal with roll-down plugs

Look elsewhere if:

  • Crews that need metal-detectable plugs for food or pharma — choose a detectable SKU instead
  • Cost-sensitive programs better served by corded or reusable flanged plugs to cut per-shift spend
  • Workers who routinely remove plugs between exposures and need a cord to keep a pair handy
  • Extreme-noise tasks where the extra few decibels of an NRR 33 foam plug are worth chasing

Related Resources

Frequently Asked Questions

Is the Moldex 6940 Glide's NRR 30 enough for my noise level?

Apply OSHA's derating before deciding. With (NRR-7)/2, the Glide's NRR 30 estimates to about 11.5 dB(A) of field protection; NIOSH's 25% foam derate gives roughly 22 dB. For an 8-hour TWA of 95-100 dBA that comfortably lands you under the 85 dBA action level. For louder exposures, dual protection (plug plus muff) may be needed. Our NRR calculation guide walks the math.

How does the 6940 Glide compare to the Moldex Pura-Fit NRR 33?

The Pura-Fit (6800) is a roll-down foam plug rated NRR 33 — three decibels higher on paper. But that label assumes a textbook roll. The Glide trades those few decibels for a twist-in insertion that is far harder to do wrong, so in real programs with mixed technique the Glide often delivers more consistent field protection. Choose Pura-Fit when you need maximum rated attenuation and trust your rolling discipline.

Should I pick the uncorded 6940 or a corded Glide for my crew?

Uncorded suits stationary workers who keep plugs in for a full shift and dislike a cord brushing their collar. Corded versions suit workers who remove plugs between exposures, where a neck cord keeps the pair from being dropped or lost. Compare the trade-offs in our corded SparkPlugs review; if loss rate is your cost driver, corded usually wins.

Is a twist-in foam plug like the Glide better than a reusable flanged earplug?

They solve different problems. The Glide is disposable and forgiving to insert, ideal for occasional users and contamination-sensitive areas. Reusable flanged plugs cost less per shift over time and produce no single-use waste, but require cleaning and consistent re-seating. High-headcount, high-frequency programs often save money long-term with reusables; intermittent or visitor use favors the Glide.

Why would I pay more for the Glide instead of a standard roll-down foam plug?

You are paying to remove a training and compliance variable. Under-rolling is the single most common reason foam plugs underperform their label, and it is hard to police across a large workforce. If even a fraction of your crew under-rolls, the Glide's twist-in design recovers protection that a cheaper roll-down plug loses in practice. For disciplined, well-trained users, a standard foam ear plug may be the better value.

Is the 6940 Glide a good fit for food or pharmaceutical production?

The twist-in design is a strong fit because workers can insert without bare-hand rolling, reducing contamination touchpoints. However, this specific 6940 SKU is not metal-detectable, so it should not be used where detectable PPE is required on the line. For those areas choose a metal-detectable plug such as the metal-detectable SparkPlugs.

Does the Glide work for small or large ear canals?

Its tapered, slow-recovery polyurethane foam expands to fill a wide range of canal sizes, which is why a single SKU serves most adults. Very small or very large canals can still seal poorly with any single plug; if a worker fails a fit-check repeatedly, offer a different size or a flanged reusable. A documented fit test, not the label, confirms adequate protection.

How does the Glide compare to the Moldex Softies?

The Softies are a softer-foam roll-down plug aimed at all-day comfort, while the Glide leads on insertion ease through its twist-in design. If your complaints are about comfort and pressure, look at Softies; if your complaints are about inconsistent fit and under-rolling, the Glide is the better answer. Both are NIOSH-approved disposables.

Is NRR 30 lower than the highest-rated foam plugs, and does that matter?

Yes — the highest-attenuation foam plugs reach NRR 33, three decibels above the Glide. After derating, that gap shrinks to roughly 1.5 dB of estimated field protection, which is usually negligible for typical industrial noise. Browse our highest-NRR ear plugs guide if you are working an extreme-noise task where every decibel counts.

Could ear muffs be a better choice than the Glide for my situation?

Muffs suit intermittent exposure, workers who remove protection often, or ear-canal conditions that make plugs uncomfortable. Plugs like the Glide suit hot, confined, or all-day wear and pair with eyewear and hard hats more easily. Many high-noise tasks call for both. See the trade-offs in our ear plugs vs ear muffs comparison.

How many shifts does one pair of Glide plugs last?

The Glide is a single-use disposable; plan on a fresh pair each shift or each time plugs are removed and soiled. Reusing a single-use foam plug lets it stay compressed, collect debris, and seal poorly — defeating the protection you bought. Budget the 100-pair pack against your headcount and shift count rather than expecting multi-day reuse from any disposable foam plug.

Will the Glide stay in place during heavy movement or sweating?

A correctly seated twist-in plug holds well for stationary and moderately active work. For high-exertion jobs with heavy sweating or repeated jaw movement, any uncorded plug can loosen over a long shift; re-check the seal periodically. Workers who need a tether to recover a loosened plug should consider a corded variant rather than the uncorded 6940.

Is the Glide suitable for occasional visitors and contractors, or only full-time staff?

It is well suited to visitors and contractors precisely because the twist-in insertion needs little training to do right — a frequent issue with one-off users handed roll-down plugs. For a regular full-time workforce, weigh whether reusable plugs or a corded option lower your long-run cost. Match the product to how often and how long it is worn.

Does buying the 100-pair pack actually save money for a program?

Bulk lowers per-pair cost, but true program cost depends on loss and replacement rate. Uncorded plugs are dropped and lost more often than corded ones, so a cheaper per-pair price can be erased by higher consumption. Track pairs issued per worker per week; if loss is high, a corded plug or a reusable may cost less overall despite a higher unit price. Browse disposable ear plugs to compare pack options.

How do I verify the Glide is actually protecting my workers?

The NRR label is a laboratory ceiling, not a guarantee. The only reliable confirmation is a field fit test that measures each worker's personal attenuation, backed by a written hearing conservation program and annual audiograms under OSHA 1910.95. Use the rating to choose a candidate plug, then verify the seal on the person wearing it — see our NRR explained guide for how lab numbers translate to real exposure.

Why trust WC Safety
Industrial PPE specialists. We do not accept manufacturer payment for placement.
Reviewed by
Steven Eaton, WC Safety Editorial — guidance reflects current OSHA, NIOSH and ANSI practice.
Our standards
Ratings combine published specs, hands-on familiarity, and verified customer data where available; we do not fabricate lab tests.
Affiliate disclosure
Some links are Amazon affiliate links (tag wcsafety04-20); purchases may earn us a commission at no cost to you.
Filed in: earplug, glide, hearing protection, moldex, nrr 30, osha 1910.95, product review
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