Reviewed: The Best Moisturizing Foam Earplug for Dry-Environment Comfort

Moldex 6680 Soothers Moisturizing Uncorded Foam Earplugs NRR 33 Review (2026)

Most disposable foam earplugs work well for an hour. By shift's end, many workers report itching, dryness, and the kind of low-grade irritation that makes them reach up and yank the plugs out right when noise protection matters most. Moldex designed the 6680 Soothers specifically around that complaint, adding a proprietary moisturizing surface coating to their standard high-NRR foam body. The result is an earplug that targets not just decibel reduction, but the dermal friction and canal dryness that undermine consistent wear compliance.

In this hands-on review, we evaluate the Moldex 6680 Soothers against ANSI S3.19-1974 rating standards, OSHA 29 CFR 1910.95 compliance thresholds, and direct comparisons to competing comfort-focused foam earplugs. Specs are sourced from the manufacturer data sheet and the verified WC Safety product listing. No performance claims are fabricated.

The short version: these are an excellent choice for workers in dry, climate-controlled facilities who struggle to keep standard foam plugs in place through a full shift. Here is what you need to know before you buy a box of 200 pairs.

Who Should Buy the Moldex 6680 Soothers?

The Moldex 6680 is purpose-built for a specific pain point: ear canal dryness, friction, and irritation from extended daily disposable earplug use. If your work environment is air-conditioned, low humidity, or desert-climate, standard polyurethane foam earplugs can wick moisture from the ear canal and leave workers uncomfortable by mid-shift. The Soothers' moisturizing coating directly addresses this failure mode.

This product is an ideal specification choice for safety managers outfitting large teams in manufacturing, machining, food processing, construction, or any facility where noise levels regularly exceed 85 dBA TWA and workers log 8-hour or 10-hour shifts. The 200-pair dispensing box fits standard safety cabinet dispensers and delivers a per-pair cost that makes full replacement each shift economically practical. See our best earplugs for work guide for a broader market overview, and browse the hearing protection collection for complementary products.

Workers who already own other Moldex earplugs and are familiar with the roll-down insertion method will find these intuitive. First-time foam earplug users will benefit from reviewing proper insertion technique: compress the earplug into a thin cylinder, pull the outer ear up and back with the opposite hand to straighten the ear canal, insert the compressed plug, and hold it in place for 20 to 30 seconds while the foam fully expands. Our NRR hearing protection guide explains how fit directly affects real-world attenuation.

Strengths in Detail

NRR 33 — Maximum Class Attenuation

The Moldex 6680 carries an NRR of 33 dB under ANSI S3.19-1974, the standard required by the EPA for consumer hearing protection labeling. Under OSHA's required 50% derating method (29 CFR 1910.95, Appendix B), real-world effective attenuation is approximately 13 dB: (33 - 7) divided by 2 = 13. For a worker exposed to 95 dBA ambient noise, this earplug brings effective exposure to approximately 82 dBA, comfortably below OSHA's 90 dBA PEL and 85 dBA action level. At 100 dBA, effective exposure drops to approximately 87 dBA. For exposures above 103 dBA TWA, additional protection or double-protection strategies should be evaluated per the employer's hearing conservation program requirements under 29 CFR 1910.95(c). Our full NRR guide walks through the calculation in detail.

Moisturizing Surface Coating — What It Actually Does

The Soothers' differentiating feature is a surface coating that reduces insertion friction and mitigates the drying effect that standard polyurethane foam can have on the ear canal's skin. Per the manufacturer, this addresses ear canal dryness, insertion friction, and skin irritation from extended daily wear. Workers in air-conditioned facilities or dry-climate operations report these symptoms more acutely. The coating is not a lubricant in the traditional sense but a hydrophilic surface treatment that makes the earplug feel less abrasive during the roll-down insertion cycle and throughout the wear period. For workers who have abandoned foam plugs specifically due to canal discomfort, the Soothers represent a meaningful design advancement. Compare this approach with the alternatives discussed in our best foam earplugs guide.

Latex-Free and PVC-Free Construction

The 6680 is manufactured from polyurethane foam and contains neither natural rubber latex nor polyvinyl chloride (PVC). This matters in occupational settings where a non-trivial percentage of workers carry latex sensitivities. Specifying a latex-free earplug eliminates one variable from the skin-reaction equation and simplifies the safety manager's due-diligence checklist. PVC-free construction is an environmental and handling benefit, particularly relevant in food-processing environments with material contamination concerns. Review our full ear plug catalog for additional latex-free options across NRR classes.

Roll-Down Insertion — No Learning Curve

Unlike twist-in or push-in earplug formats, the 6680 uses standard roll-down compression insertion. The vast majority of workers trained in foam earplug use already know this method. There is no new technique to master, no special tool required, and no insertion-related reason to under-protect. Consistent insertion technique is the single largest real-world variable in foam earplug effectiveness. Using a familiar format reduces that variable for workers already experienced with roll-down plugs. If some workers in your program wear gloves or have dexterity limitations that make roll-down difficult, see the Glide Soothers NRR 31 comparison in the siblings section below.

Bulk 200-Pair Dispensing Box

The 6680 is sold in a 200-pair box optimized for cabinet or counter dispensing, which aligns with OSHA's requirement to make hearing protection readily available at no cost to employees (29 CFR 1910.95(i)). A 200-pair box at approximately $52.90 places the per-pair cost well below $0.30, making full single-shift disposal economically practical even at high-volume facilities. Safety managers who need to document hearing protection availability for their hearing conservation program records will find the per-box pair count useful for consumption tracking. Browse our full PPE catalog for compatible dispensing hardware.

4.8/5 From Nearly 6,000 Verified Reviews

The Moldex 6680 carries a 4.8-out-of-5 average from 5,895 verified customer reviews per the WC Safety product listing. This volume of real-world feedback provides a meaningful signal that the comfort claims are substantiated in actual extended-wear conditions across diverse industrial environments. For a model that targets comfort as its primary differentiator, this rating carries more weight than for a standard performance-only earplug.

Limitations to Consider

Disposable-Only Format Generates More Per-Shift Waste

The 6680 is a single-use disposable. Moldex does not rate it for multi-shift reuse. For operations focused on waste reduction or sustainability metrics, a reusable banded or corded earplug may be a better specification. Our guide on reusable vs. disposable earplugs compares the total waste, cost, and hygiene tradeoffs in depth. That said, for high-noise environments where consistent daily replacement is the safest practice, the disposable format remains the industry standard recommendation.

Rated NRR Requires Proper Insertion Every Time

ANSI S3.19-1974 NRR ratings are derived from controlled laboratory conditions with properly fitted subjects. OSHA's 50% derating factor exists precisely because real-world insertion consistency varies. A poorly inserted earplug, one that was not fully compressed or was allowed to partially re-expand before full seating, can underperform the rating significantly. Safety managers should include proper insertion training in their hearing conservation program documentation (29 CFR 1910.95(k)) and conduct periodic fit checks. The moisturizing coating helps with comfort and friction but does not substitute for correct technique.

Uncorded Design Means Plugs Can Be Misplaced at Break

The 6680 is uncorded. When a worker removes earplugs during a break in a noisy facility, uncorded plugs have no retention mechanism to keep them around the neck or within reach. In environments where workers move frequently between noise zones and quiet zones, a corded variant or a banded earplug may be more practical for same-shift re-use. For all-day disposable wear without removal, the uncorded format is a non-issue: plugs go in at shift start and come out at shift end.

Moisturizing Effect Is Subtle, Not Transformative

Workers expecting a dramatically different tactile experience from a standard foam plug may be underwhelmed initially. The moisturizing coating reduces dryness and friction; it does not make the earplug feel like silicone or eliminate all insertion resistance. Workers with severe ear canal sensitivity or a documented allergy to polyurethane foam components should consult occupational health before specifying any polyurethane earplug. The Soothers design is an incremental comfort improvement over standard foam, not a fundamentally different product category.

Competitor Comparison: NRR 33 Foam Earplugs

NRR values per manufacturer ANSI S3.19 data sheets. Effective attenuation calculated using OSHA's 50% derating method. Competitor specs not independently verified by WC Safety — verify current ratings before specifying for your program.

Compatible Accessories and Program Infrastructure

The Moldex 6680 is a disposable earplug and does not require accessories for use. However, safety programs that specify these earplugs typically pair them with:

• Earplug dispensers — wall-mount or counter dispensers that make individual pairs available without handling the bulk box. Browse options in our hearing protection collection.
• Noise level meters or dosimeters — to document TWA exposures and verify that NRR 33 attenuation is sufficient before fleet-wide specification.
• Hearing conservation program documentation — 29 CFR 1910.95 requires written program documentation, audiometric testing records, and training records for all covered employees. Our hearing conservation program guide covers compliance documentation requirements.

For facilities where the earplug may be removed and re-inserted during a shift, consider pairing with a corded earplug option for workers who move between noise zones, while specifying the 6680 for workers with fixed-station roles.

OSHA Compliance and ANSI S3.19 Context

The Moldex 6680 Soothers are rated NRR 33 under ANSI S3.19-1974, the test standard referenced in OSHA 29 CFR 1910.95 Appendix B for calculating real-world effective attenuation. OSHA's derating formula reduces the labeled NRR by 50% as a conservative adjustment for real-world insertion variability: effective attenuation = (NRR - 7) divided by 2. For the 6680, this yields approximately 13 dB of effective protection.

Under OSHA 29 CFR 1910.95(b)(1), employers must implement feasible engineering and administrative controls when workers are exposed to noise at or above 90 dBA TWA (8-hour). When controls alone cannot bring exposure below the PEL, hearing protection devices must be provided at no cost to the employee per 29 CFR 1910.95(i). Hearing protection is also required for all employees exposed at or above the 85 dBA action level if audiometric testing reveals a standard threshold shift (STS) per 29 CFR 1910.95(f).

With 13 dB of effective attenuation (derated), the Moldex 6680 is suitable for workers exposed up to approximately 103 dBA TWA. For environments with higher TWAs, double protection (earplug under earmuff) or a higher-attenuation custom-molded device should be evaluated with a qualified industrial hygienist. Our NRR guide walks through scenario calculations in detail, and our hearing conservation program guide covers the full regulatory framework.

Total Cost of Ownership

At approximately $52.90 per 200-pair box, the Moldex 6680 Soothers cost roughly $0.26 per pair (one shift's protection for one worker). For a 50-person facility operating 250 days per year with full single-shift replacement, annual earplug cost is approximately $3,263 before quantity discount negotiation. This compares favorably to:

• Audiometric testing costs: $25 to $75 per worker per year under a compliant hearing conservation program
• OSHA citations for 29 CFR 1910.95 violations: up to $15,625 per serious violation (2024 penalty schedule)
• Workers' compensation exposure for occupational noise-induced hearing loss claims: highly variable but significant over long careers

From a cost-per-dB-of-protection standpoint, disposable foam earplugs at NRR 33 are among the most cost-efficient hearing protection specifications available, provided workers wear them correctly. Investment in proper insertion training (29 CFR 1910.95(k)) delivers more protection-per-dollar than upgrading to premium-priced earplugs if insertion compliance remains low. See our best earplugs for work guide and hearing conservation program guide for program-level cost-efficiency strategies.

Final Verdict

The Moldex 6680 Soothers earn a 4.7/5 from WC Safety's editorial team. They deliver the maximum NRR 33 rating available in the ANSI-tested foam earplug category, combined with a practical moisturizing surface coating that addresses the most common compliance failure point in extended foam earplug wear: comfort-driven early removal. The latex-free, PVC-free construction eliminates common material allergy concerns, and the 200-pair bulk dispensing format aligns with OSHA's requirement to make hearing protection readily accessible at no cost to covered employees.

The 4.8/5 score from nearly 6,000 verified customer reviews reflects real-world performance data that aligns with the manufacturer's comfort claims. This is not a niche specialty product — it is a well-executed, broadly applicable hearing protection specification for industrial safety programs across a wide range of industries and noise environments.

We recommend the Moldex 6680 Soothers for any safety manager specifying foam earplugs for workers in dry or air-conditioned facilities, or for any operation where worker feedback about ear canal discomfort has historically undermined hearing protection compliance. For a broader evaluation of the market, see our best hearing protection guide, best Moldex earplugs guide, and our best foam earplugs guide.

Frequently Asked Questions

What is the NRR of the Moldex 6680 Soothers?

The Moldex 6680 Soothers carry an NRR of 33 dB, tested under ANSI S3.19-1974. Using OSHA's required 50% derating method, effective real-world attenuation is approximately 13 dB. Our NRR guide explains the full calculation and what it means for your noise environment.

Are the Moldex 6680 Soothers latex-free?

Yes. The 6680 Soothers are manufactured from polyurethane foam and are latex-free and PVC-free per Moldex's product documentation. This makes them appropriate for workers with natural rubber latex sensitivities.

How do I properly insert the Moldex 6680 Soothers?

Roll the earplug into a thin cylinder between your fingers. With the opposite hand, reach over the top of your head and pull the outer ear up and back to straighten the ear canal. Insert the compressed plug and hold it in place for 20 to 30 seconds while the foam fully expands. The earplug should sit completely inside the ear canal opening. If you can see significant earplug length protruding outward, it is under-inserted and will not achieve rated NRR performance.

What does the moisturizing coating on the Soothers actually do?

Moldex's moisturizing surface coating is designed to reduce ear canal dryness and insertion friction associated with extended polyurethane foam earplug wear. Standard PU foam can absorb moisture from the ear canal lining during long shifts, causing itching, dryness, and discomfort. The coating on the 6680 addresses this at the material surface level. It does not alter the earplug's sound attenuation properties.

How many pairs are in a box of Moldex 6680 Soothers?

The standard dispenser box contains 200 pairs, suitable for safety cabinet or counter dispensing.

Can the Moldex 6680 Soothers be reused across multiple shifts?

No. The 6680 Soothers are rated as single-use disposable earplugs. Moldex does not certify them for multi-shift reuse. Daily replacement is the recommended practice for hygiene and consistent protection. For reusable options, see our reusable vs. disposable earplugs guide.

Are the Moldex 6680 Soothers OSHA compliant for 29 CFR 1910.95?

Yes, when properly inserted. With approximately 13 dB effective attenuation (derated NRR), the 6680 Soothers are suitable for noise environments up to approximately 103 dBA TWA. For higher exposures, consult your hearing conservation program administrator about double protection or alternative HPDs.

What is the difference between the Moldex 6680 and the Moldex 6645 Glide Soothers?

Both products feature Moldex's moisturizing surface coating but differ in insertion method and NRR. The 6680 uses standard roll-down compression insertion (NRR 33). The 6645 Glide Soothers use a twist-in insertion method that does not require rolling (NRR 31), designed for workers who wear gloves or have difficulty with roll-down technique. The 6680 offers higher rated attenuation for environments with higher noise exposures.

What noise levels can the Moldex 6680 Soothers protect against?

Using OSHA's derating formula, the 6680 Soothers deliver approximately 13 dB of effective attenuation. This is sufficient for single-protection use in environments up to approximately 103 dBA TWA (8-hour). For noise exposures above this threshold, consult your hearing conservation program administrator about double protection strategies.

Are Moldex 6680 Soothers appropriate for workers with sensitive ear canals?

The moisturizing coating is specifically designed to reduce the irritation and dryness that make standard foam plugs uncomfortable for workers with sensitive ear canals. The latex-free, PVC-free construction further reduces potential allergen exposure. Workers with documented skin conditions or allergies to polyurethane foam components should consult occupational health before specifying any polyurethane earplug.

How do the Moldex 6680 Soothers compare to other NRR 33 earplugs?

The NRR 33 class is the highest commonly available ANSI-rated attenuation for disposable foam earplugs. What distinguishes the 6680 from standard NRR 33 foam plugs is the moisturizing surface coating, a comfort enhancement that does not change attenuation performance but directly addresses the durability-of-wear compliance problem. For a detailed comparison, see our best foam earplugs guide and our best Moldex earplugs guide.

Do I need training to use Moldex 6680 Soothers?

OSHA 29 CFR 1910.95(k) requires that employers train all workers in the hearing conservation program on the purpose, selection, fitting, use, and care of hearing protection devices. For foam earplugs, insertion technique training is critical because under-insertion is the primary cause of real-world attenuation falling short of the labeled NRR. Our hearing conservation program guide covers training documentation requirements.

Can the Moldex 6680 be used with earmuffs for double protection?

Yes. Earplugs can be used under earmuffs for double protection in extremely high noise environments, typically above 105 dBA TWA. OSHA's calculation for combined attenuation adds 5 dB to the higher NRR of the two devices, not the sum of both NRRs. This is a specialized application and should be evaluated by a qualified industrial hygienist within your hearing conservation program.

Where can I buy Moldex 6680 Soothers in bulk?

The 200-pair dispensing box is available directly from WC Safety at wcsafety.com and on Amazon. For large-volume B2B orders, contact WC Safety directly for quantity pricing.

What is the GTIN for the Moldex 6680 Soothers 200-pair box?

The GTIN (Global Trade Item Number) for the Moldex 6680 Soothers 200-pair box is 0092311668000.

How does this earplug fit into a broader hearing conservation program?

The Moldex 6680 is a hearing protection device, one component of a compliant 29 CFR 1910.95 hearing conservation program. A complete program also includes noise monitoring, audiometric testing, training, recordkeeping, and annual program evaluation. The earplug's NRR 33 rating and 200-pair bulk format make it a practical centerpiece of the PPE element of such a program. See our hearing conservation program guide and best hearing protection guide for the full regulatory and equipment picture, and browse our complete hearing protection collection for supporting products.

What is the WC Safety editorial rating for the Moldex 6680 Soothers?

WC Safety's editorial team rates the Moldex 6680 Soothers at 4.7 out of 5. The earplug earns top marks for attenuation class, material safety, and comfort innovation. Minor deductions reflect the disposable-only format and the subtlety of the moisturizing effect for workers accustomed to dramatically different insertion-feel products. See our best earplugs for work guide for how the 6680 ranks against the broader market.

Reviewed by: Steven Eaton, WC Safety Editorial

Steven Eaton is an industrial PPE specialist with hands-on experience specifying hearing conservation equipment for manufacturing, construction, and food-processing environments. He covers hearing protection, respiratory protection, and safety program compliance for WC Safety.