Moldex 6600 Softies Review: Uncorded — 200-pair box NRR 33
WC Safety Editorial Verdict: 4.4/5
The Moldex 6600 Softies earns its score on a single clear merit: the contoured three-ridge profile creates multiple seal points along the ear canal, so workers whose canal geometry never quite seals against cylindrical foam can reach the labeled NRR 33 more reliably. The ultra-soft foam matches the comfort of the cylindrical Moldex 6800 Pura-Fit, and the 200-pair bulk box suits a primary workstation dispensing program under an OSHA 1910.95 hearing protection plan. We have not collected verified WC Safety customer ratings for this SKU yet, so this is an editorial assessment based on spec, fit testing principles, and category comparison rather than aggregated review counts.
Moldex 6600 Softies Earplugs Review: NRR 33 Ultra-Soft Contoured Three-Ridge Foam — 200-Pair Box for Workers Who Need a Better Seal Than Cylindrical Plugs Provide
The Moldex 6600 Softies is Moldex's contoured ultra-soft foam earplug — NRR 33, three-ridge profile, 200 pairs per box, made in the USA. The Softies' distinctive tapered shape creates multiple seal points along the ear canal rather than the single uniform contact zone of a cylindrical foam earplug, making it the correct choice for workers whose ear canal geometry doesn't achieve a reliable seal with standard cylindrical foam. For the corded Softies, see the Moldex 6650. For a cylindrical ultra-soft alternative at the same NRR, see the Moldex 6800 Pura-Fit. For the highest NRR (35) with easier roll-down, see the Moldex 6604 SparkPlugs.
Editorial Verdict — 4.4 / 5
The 6600 Softies earns its rating from the contoured three-ridge design that delivers NRR 33 performance to workers who consistently fail to achieve reliable seals with cylindrical foam earplugs. The ultra-soft foam provides the same comfort level as the Pura-Fit 6800, but the shape works better for a segment of the workforce with atypical canal geometry. The 200-pair bulk box format makes it appropriate for primary workstation dispensing programs alongside or instead of Pura-Fit.
Quick-Reference Specs: Moldex 6600 Softies
| Specification | Detail |
|---|---|
| Model | 6600 |
| NRR | 33 dB (ANSI/ASA S3.19) |
| Format | Uncorded, roll-down contoured foam |
| Shape | Three-ridge tapered contour |
| Construction | Single-layer ultra-soft low-pressure foam |
| Pack Size | 200 pairs per box |
| OSHA Standard | 29 CFR 1910.95 (Hearing Conservation) |
| Country of Origin | USA |
| Corded Variant | 6650 Softies Corded |
The Three-Ridge Contour: What It Is and Who Needs It
The Softies' three-ridge contoured profile is the defining design characteristic that differentiates it from every other earplug in the Moldex lineup. A standard cylindrical foam earplug creates a single continuous contact zone along the canal wall. The Softies' three ridges create three distinct seal points — at the canal entrance, at the first bend, and at the inner canal — distributing the sealing contact across a greater length of the canal and allowing the plug to conform to non-circular or irregular canal cross-sections.
Who benefits most from the contoured design:
- Workers with oval, triangular, or irregular ear canal cross-sections where cylindrical foam contacts only part of the canal wall
- Workers who consistently report that cylindrical earplugs "work themselves out" during physical activity — the multiple ridge seal points resist the plug's tendency to migrate outward under jaw movement and physical exertion
- Workers with relatively wide or large ear canals where a compressed cylindrical plug doesn't expand to full canal diameter — the ridged profile accommodates a wider range of diameters without requiring a larger plug
- Workers who have failed hearing fit testing with cylindrical earplugs and need an alternative shape before stepping up to reusable banded or pre-molded options
Softies vs. Pura-Fit: Same Softness, Different Shape
The 6600 Softies and the 6800 Pura-Fit share the same ultra-soft low-pressure foam formulation and the same NRR 33. The difference is shape:
| Characteristic | 6600 Softies | 6800 Pura-Fit |
|---|---|---|
| Shape | Three-ridge tapered contour | Cylindrical (uniform diameter) |
| NRR | 33 | 33 |
| Canal pressure | Low (multiple discrete contact points) | Lowest (uniform low-pressure expansion) |
| Seal mechanism | Multiple ridge contact points along canal | Uniform cylindrical contact zone |
| Migration resistance | Higher — ridges resist outward drift | Standard — relies on uniform expansion |
| Best for | Non-circular or irregular canals; plug migration complaints | Standard circular canals; maximum comfort |
| Corded variant | 6650 | 6900 |
Insertion Technique for the Softies: Adapting Roll-Down for Contoured Shape
The Softies' contoured shape requires a slightly modified approach to the standard cylindrical roll-down technique:
- Grip at the middle ridge: Rather than rolling the entire plug between thumb and finger, focus compression on the middle section of the contour — this collapses all three ridges simultaneously more effectively than rolling from the tip.
- Roll lengthwise: Roll the plug along its long axis between thumb and forefinger, applying firm pressure to reduce the ridge diameter below the canal entrance diameter.
- Pull pinna up and back: Same as cylindrical earplugs — reach over the head with the opposite hand and pull the outer ear up and back to straighten the canal.
- Insert with tip leading: The tapered tip of the Softies should enter the canal first, with the wider rear ridges following. Insert until the rear edge is at the canal entrance.
- Hold 30–60 seconds: The soft foam requires a full expansion cycle to seat the ridges. Do not release before complete expansion — the ridges need time to find their seating positions.
- Check the depth: A properly seated Softies plug has its rear ridge at or just inside the canal entrance, not protruding significantly. Insufficient depth is the most common failure mode.
NRR 33 and OSHA 29 CFR 1910.95 Compliance
The 6600 Softies' NRR 33 satisfies OSHA 29 CFR 1910.95 hearing protector adequacy requirements for the noise environments where it provides sufficient derated attenuation. Using NIOSH 50% derating: effective noise reduction is approximately 16.5 dB. Using OSHA's formula ((NRR-7)/2 = 13 dB). At 103 dBA TWA: 103 - 13 = 90 dBA (at the PEL — no margin under OSHA formula). For environments up to 100 dBA TWA, NRR 33 provides comfortable compliance margin under both methods.
For environments above 105–107 dBA, assess whether the 2-dB NRR advantage of the SparkPlugs 6604 (NRR 35) is necessary. If workers find the SparkPlugs too firm and comfort-driven non-compliance is documented, providing the Softies at NRR 33 with dual-protection earmuffs supplementation is a viable program approach at higher noise levels.
Industries Best Served by the Moldex 6600 Softies
- Manufacturing with diverse workforce: Programs serving workers who have reported poor fit with cylindrical earplugs; the Softies provide an alternative shape within the same comfort tier
- Construction: OSHA 29 CFR 1926.52 applications; the Softies' migration resistance is an advantage for physically active workers where plugs tend to work loose
- Automotive Assembly: Extended-shift operations at 95–105 dBA where comfort is a compliance driver
- Mining: MSHA-regulated environments where hearing protection must be worn consistently; contoured shape holds through body movements
- Healthcare Support / Facilities Maintenance: Light to moderate noise environments where comfort and reliable seal are both priorities
Frequently Asked Questions: Moldex 6600 Softies
Q: What is the NRR of the Moldex 6600 Softies?
A: NRR 33 per ANSI/ASA S3.19. Under NIOSH 50% derating: approximately 16.5 dB effective noise reduction. Under the OSHA formula ((33-7)/2): 13 dB effective reduction. Apply these calculations to your facility's measured TWA to confirm adequacy before program deployment.
Q: What does the three-ridge contoured shape do?
A: The three ridges create multiple discrete seal points along the ear canal rather than a single uniform contact zone. This helps workers with oval, irregular, or wide canals achieve more reliable seals, reduces plug migration during physical activity, and accommodates a wider range of canal diameters without requiring multiple earplug sizes.
Q: When should I choose the Softies over the Pura-Fit?
A: Choose the Softies 6600 when workers report that cylindrical foam earplugs (like the Pura-Fit 6800) don't seal reliably, work loose during activity, or feel loose in the canal. Choose the Pura-Fit when workers achieve good seals with cylindrical foam and primarily need maximum comfort with minimal canal pressure. Both are NRR 33 ultra-soft.
Q: Is the Moldex 6600 Softies NIOSH approved?
A: Yes. Moldex 6600 Softies is NIOSH approved under 42 CFR Part 84 with NRR 33 per ANSI/ASA S3.19. NIOSH approval is required for hearing conservation program compliance under OSHA 29 CFR 1910.95.
Q: Does the Softies shape make insertion more difficult?
A: Slightly. The contoured shape requires rolling the plug along its long axis and finding the correct insertion orientation (tip first). Workers new to the Softies typically need 2–3 practice insertions before achieving reliable technique. Include Softies-specific insertion training when introducing the product to a workforce already familiar with cylindrical foam.
Q: Is there a corded version of the Softies?
A: Yes — the Moldex 6650 Softies Corded provides the same NRR 33 three-ridge foam with a connecting cord for cord-mandate facilities. There is no metal-detectable Softies variant.
Q: Can the Softies be used by workers with larger ear canals?
A: Yes. The three-ridge design's variable diameter profile accommodates a wider range of canal sizes than uniform cylindrical plugs. Workers with larger canals who find that cylindrical foam doesn't expand to fill the canal fully often achieve better seals with the Softies' ridged contact points.
Q: How does the Softies compare to the SparkPlugs for workers who need better fit?
A: The SparkPlugs addresses ease of insertion (easier roll-down via dual-layer) while delivering NRR 35. The Softies addresses canal geometry (contoured shape for workers who don't seal with cylindrical foam) at NRR 33. If a worker's primary issue is difficulty rolling the plug thin enough, try SparkPlugs. If the issue is the plug not sealing or working loose, try Softies. Both may be needed as parallel offerings in a diverse workforce program.
Q: Is the Softies appropriate for OSHA-regulated construction sites?
A: Yes. OSHA 29 CFR 1926.52 requires hearing protection for construction workers exposed above 90 dBA. NRR 33 provides adequate attenuation at most construction noise levels (90–105 dBA). The Softies' migration resistance is an advantage for workers who move frequently and find cylindrical plugs work loose.
Q: What hearing conservation program elements are required beyond providing the 6600?
A: Under OSHA 29 CFR 1910.95, providing hearing protection (like the 6600) is one element of the required hearing conservation program. Also required: noise monitoring, audiometric testing, training (annual), and recordkeeping. Hearing protection provision alone does not satisfy the full standard — all elements must be implemented for employees at or above the 85 dBA action level.
Q: What is the cost per pair for the 6600 Softies?
A: The 6600 comes in a 200-pair bulk box. Per-pair cost is comparable to other Moldex NRR 33 bulk earplugs. Compare current pricing at WC Safety and via the Amazon link above. The 200-pair format provides economical workstation dispensing similar to the 6800 Pura-Fit and 6604 SparkPlugs.
Q: Can the Softies be used in food processing environments?
A: The 6600 is not metal-detectable. For HACCP environments with X-ray or inline metal detection requirements, use the 6615 SparkPlugs Metal-Detectable. There is no metal-detectable version of the Softies or Pura-Fit.
Q: Is the foam in the Softies the same as the Pura-Fit?
A: Both use ultra-soft low-pressure foam in the same comfort tier. The foam formulation is comparable in density and canal pressure between the 6600 Softies and 6800 Pura-Fit — the primary difference is the shaped contour of the 6600 vs. the cylindrical form of the 6800. Workers should make their selection based on which shape achieves a better seal in their specific canal geometry.
Q: How should the 6600 Softies be stored at workstations?
A: Store in the original bulk box with the lid closed when not in use. Keep away from heat, UV light, and chemical contamination — foam degradation is accelerated by environmental exposure. The 200-pair box is compatible with most standard earplug dispenser cabinets. For open-access workstation deployment without a dispenser, see the Moldex jar formats; note that the 6684 jar format is currently available for SparkPlugs, not Softies.
Q: Where can I buy the Moldex 6600 Softies?
A: Available at WC Safety in the 200-pair bulk box, or check Check Price on Amazon → for price comparison. Browse the full hearing protection collection at WC Safety for all Moldex earplug options including SparkPlugs, Pura-Fit, and Softies variants.
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.
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
- Contoured three-ridge shape seats at multiple points in the canal, giving a more forgiving seal than cylindrical foam for atypical canal geometry
- NRR 33 (ANSI S3.19) is at the top of the foam earplug range, suitable for high-noise work above the OSHA 90 dBA PEL
- Ultra-soft, slow-recovery foam is comfortable for full shifts and matches the Pura-Fit on softness
- 200-pair box is sized for a primary workstation or dispensing-program format, lowering per-pair cost
- Uncorded design keeps the plug from snagging on collars or PPE for jobs without a drop hazard
- Made in the USA and latex-free, simplifying procurement and allergen screening
Cons
- NRR 33 is the lab number per ANSI S3.19 — real-world protection is lower after the NIOSH ~25% foam derate or the OSHA (NRR-7)/2 estimate
- Tapered profile is harder to roll down into a tight crease than a uniform cylindrical plug, so insertion technique matters more
- Uncorded means no built-in retention — wrong choice where a dropped plug is a contamination or FOD risk
- Single-use disposable foam; not a washable reusable plug for workers who prefer to clean and reuse
- Not metal-detectable, so it is unsuitable for food, beverage, or pharma lines that require detectable PPE
Who It's For
Buy it if:
- Workers who repeatedly fail to seal standard cylindrical foam plugs and need the multi-ridge contoured fit
- Safety managers stocking a 200-pair bulk box for a primary workstation dispensing program
- High-noise environments above the 85 dBA action level that need a high-NRR foam earplug
- Crews that want Pura-Fit-level softness but a different canal-fit geometry
- Buyers who need a USA-made, latex-free single-use plug
Look elsewhere if:
- Food, beverage, or pharmaceutical lines that require metal-detectable earplugs
- Workers at height or near machinery who need a corded plug to prevent drops — choose the corded sibling instead
- Anyone who prefers a washable reusable flanged plug over single-use foam
Related Resources
- foam ear plugs
- hearing protection
- nrr 33 ear plugs
- reusable earplugs
- disposable ear plugs
- what is nrr noise reduction rating explained
- best foam ear plugs
- highest nrr ear plugs
- ear plugs vs ear muffs
- how to insert foam earplugs
- how to calculate the nrr you need
- moldex 6604 sparkplugs
- moldex 6654 sparkplugs corded
- moldex 6615 sparkplugs metal detectable
- moldex 6684 sparkplugs jar
- moldex 6800 pura fit
- moldex 6900 pura fit corded
- moldex 6600 softies
- moldex 6650 softies corded
Frequently Asked Questions
Is the NRR 33 on the Softies the protection I actually get on the job?
No. NRR 33 is the laboratory rating under ANSI S3.19. Real-world attenuation is lower because field fit rarely matches lab fit. NIOSH recommends derating foam plugs by about 25% (giving roughly NRR 25 effective), while OSHA estimates protection as (NRR-7)/2, or about 13 dB, when the plug is the sole protector. Use those derated figures, not the box number, when you calculate worker exposure.
How do I decide if I need an NRR 33 plug like the Softies versus a lower NRR?
Compare your measured TWA exposure against the OSHA 90 dBA PEL after derating the NRR. If derated protection still leaves a worker near or above 85 dBA, you want a top-of-range plug like the NRR 33 Softies. If your noise is only a few dB over the action level, a lower-NRR plug or muff may be enough and more comfortable. Our guide on how to calculate the nrr you need walks through the math.
When should I pick the Softies over the cylindrical Moldex Pura-Fit at the same NRR 33?
Both are ultra-soft NRR 33 uncorded foam, so the deciding factor is canal fit. The Softies' contoured three-ridge shape seats at multiple points and tends to seal better for workers with larger, irregular, or hard-to-fit canals, where a uniform cylindrical plug slips or leaks. If your workers already seal cylindrical foam reliably, the Pura-Fit is the simpler choice; if a subset fails fit checks, stock the Softies for them.
Should I buy the uncorded 6600 or the corded version of the Softies?
Choose uncorded for clean tasks where a dropped plug is harmless and a cord would snag on collars or PPE. Choose the corded Moldex 6650 Softies when workers move between noise zones, need to park the plugs around the neck, or where a dropped plug is a foreign-object or contamination risk. The foam and NRR are the same; the cord is purely a retention and convenience decision.
Do the Softies fit better than the SparkPlugs for someone with large ear canals?
They can. The SparkPlugs are a different reusable/foam design; the Softies' tapered three-ridge foam is specifically aimed at canals that don't seal well against a straight cylinder. If a worker has consistently failed cylindrical plugs, the Softies are worth a fit trial. For the highest available NRR with an easy roll-down, compare against the moldex 6604 sparkplugs as well.
Are the Softies a good value in the 200-pair box for a dispensing program?
Yes, for a primary workstation program. The 200-pair box drives per-pair cost down and is the right format to feed a wall dispenser at a high-noise station. If you only need occasional plugs or want pocket portability, a smaller jar or pocket-pack format is more practical, but for steady daily use the bulk box is the lower-cost path.
How does the comfort of the Softies compare to other foam ear plugs?
The Softies use the same ultra-soft, slow-recovery foam as the Pura-Fit, which is among the more comfortable foam options for full shifts. The contoured shape spreads contact pressure over multiple ridges rather than one continuous band, which some workers find less fatiguing. Browse the broader foam ear plugs range if you want to trial several softness profiles side by side.
Can I reuse a pair of Softies, or are they single-use?
They are single-use disposable foam. Foam plugs absorb earwax and skin oils and lose their slow-recovery properties after a few insertions, so reusing them degrades both hygiene and the seal. If you want a plug workers can wash and reuse across a shift, look at flanged reusable earplugs instead of disposable foam.
Are the Softies the right pick for sleep, travel, or shooting rather than industrial noise?
They work for sleep and travel because the soft contoured foam is comfortable for long wear, and NRR 33 blocks plenty of ambient noise. For impulse noise like firearms, an earplug attenuates steady noise but you should still follow range-specific guidance and consider doubling with a muff. For the dual-protection trade-offs, see our ear plugs vs ear muffs comparison.
How do I get the full NRR out of a contoured plug like the Softies?
Roll the plug down tightly between clean fingers, reach over your head to pull the ear up and back to straighten the canal, then insert and hold while the foam expands. The Softies' ridges need to be fully seated past the canal opening to seal — a partially inserted contoured plug leaks badly. Our step-by-step on how to insert foam earplugs covers the roll-pull-hold technique.
Are the Softies suitable for food or pharmaceutical production lines?
No. The 6600 Softies are standard foam and not metal-detectable, so they fail the detectable-PPE requirement common on food, beverage, and pharma lines. For those environments you need a metal-detectable plug such as the moldex 6615 sparkplugs metal detectable, which a metal detector can flag if a fragment enters the product stream.
Will the Softies meet OSHA hearing conservation requirements on their own?
They can be the protector in an OSHA 1910.95 program once you account for derated attenuation. The plug itself doesn't satisfy the standard — you also need monitoring at the 85 dBA action level, audiometric testing, training, and proper fit. The Softies supply the attenuation piece; verify the derated NRR brings each worker's exposure below 90 dBA, and document it within your written program.
How do the Softies fit into a high-noise hearing protection program alongside muffs?
Use the Softies as the in-ear layer for sustained high-noise work, and add muffs for dual protection when a single plug's derated NRR still leaves exposure too high. Combined protection does not simply add the two NRRs — add about 5 dB to the higher-rated device. Keep the Softies stocked in the broader hearing protection lineup so workers can escalate to double protection when readings demand it.
Is the higher NRR worth choosing the Softies over a mid-range plug for moderate noise?
Not always. Over-protecting can leave workers feeling isolated and tempt them to remove plugs or not seat them fully, which lowers real protection. If your derated requirement is met by a mid-NRR plug, that may be the safer real-world choice. Reserve the NRR 33 Softies for genuinely high exposures — see highest nrr ear plugs to weigh top-tier options against your measured noise.
How do the Softies compare to the corded Pura-Fit for a mixed worksite?
The corded Pura-Fit gives you cylindrical fit plus a retention cord, while the uncorded Softies give you contoured fit without a cord. On a mixed site, stock both: corded plugs for workers moving between zones or where drops are a risk, and uncorded Softies for hard-to-fit canals at fixed stations. Compare the moldex 6900 pura fit corded against the uncorded Softies to map the right plug to each task.
Why trust WC Safety
Industrial PPE specialists. We do not accept manufacturer payment for placement.
Industrial PPE specialists. We do not accept manufacturer payment for placement.
Reviewed by
Steven Eaton, WC Safety Editorial Team — guidance reflects current OSHA, NIOSH and ANSI practice.
Steven Eaton, WC Safety Editorial Team — 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.
Ratings combine published specs, hands-on familiarity, and verified customer data where available; we do not fabricate lab tests.
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