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Industrial Safety Equipment, PPE Guides & Reviews
Industrial Safety Equipment, PPE Guides & Reviews
Moldex 6940 Glide Cordless Earplugs — NRR 30 product photo
May 13, 2026 Steven Eaton

Moldex 6940 Glide Review

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?

Published · Last updated

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
EPA NRR Label 40 CFR Part 211
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 earplug sold in the US carries an EPA-required 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 (50% derating for formable foam): The same arithmetic as the OSHA estimate — NIOSH keeps 50% of (NRR − 7) for formable foam
  • 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: No — NIOSH approval covers respirators; earplugs carry the EPA NRR label under 40 CFR Part 211. The NRR 30 value is tested per ANSI S3.19-1974 and labeled under EPA 40 CFR Part 211. 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 the OSHA hearing conservation requirements applicable to both general industry (1910.95) and construction (1926.52).

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: reviewed 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. All Moldex earplugs are made in the USA and carry the EPA-required NRR label.

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.

Browse and Compare on WC Safety

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); NRR labeled under EPA 40 CFR Part 211
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

Common questions

Is dual protection ever required?

Once OSHA's derating still leaves the measured average above 85 dBA. Plugs worn under muffs are the standard escalation — the combination generally buys about 5 dB over the better single device — and past that point the fix is engineering controls, not shopping.

What is the two-second fit check?

Listen for the occlusion effect: a properly seated plug makes your own voice sound hollow and boomy while outside noise falls away sharply. A plug that leaves your speech sounding ordinary is not sealed — reseat it, whatever the comfort says.

Sources. Requirements referenced here come from OSHA 29 CFR 1910 and the NIOSH recommendations. Where a consensus standard governs, the ANSI document is named in the text.

Related reference

Closely related on this site: 3m 1100 foam ear plugs, cordless (uncorded) - nrr 29, 200-pair box, 3m 1110 foam earplugs nrr 30 200 pairs, what is nrr noise reduction rating explained, best metal detectable ear plugs, disposable vs reusable ear plugs: which should your facility buy?, and ear plugs vs ear muffs: which hearing protection do you need?.

Why trust WC Safety

WC Safety is an independent, affiliate-supported review site. It is not a retailer: it holds no inventory, takes no orders, and earns only from qualifying purchases through clearly marked links — which never changes what a product is rated to do. Standards language is taken from the regulation text directly, and ratings are reported as the manufacturer publishes them. We run no laboratory and perform no testing of our own. Where published sources disagree, we say so and plan on the conservative figure rather than the flattering one.

Our methodology

Figures come from the regulation and the published specification, in that order. Derated numbers are calculated, not estimated. Nothing here is presented as a measured result, because we measure nothing.

Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers and regulators publish, with the gaps in that record marked. Last reviewed August 2026.

Affiliate disclosure: as an Amazon Associate, WC Safety earns from qualifying purchases. WC Safety is not a retailer and takes no orders — links go to the seller, and the price you pay is unchanged.

Filed in: 6940, Disposable Earplugs, earplug, glide, gloves, hearing protection, individually-wrapped, moldex, no-roll, nrr 30, osha 1910.95, product review
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