Moldex 6646 Goin' Green PlugStation Review: 250-Pair Earplug Dispenser (NRR 33)
WC Safety Editorial Verdict: 4.4/5
WC Safety Editorial Verdict — 4.4/5. The Moldex 6646 Goin' Green PlugStation is the cleanest way to standardize a wall-mounted, NRR 33 foam program when your procurement team needs documentable PVC-free chemistry — you get the same top-tier attenuation as Moldex's 6800 Pura-Fit with a green-chemistry story the others can't match. The catch is cost-per-pair: dispenser-fed individual pairs run higher than bulk-box foam ear plugs, so the 6646 earns its place in hygiene-sensitive or sustainability-mandated facilities rather than as a pure lowest-cost option. It loses half a point only on the uncorded, non-metal-detectable single format — review the NRR 33 ear plugs range if you need corded or detectable variants.
Moldex 6646 Goin' Green PlugStation Review: PVC-Free Earplug Dispensing for Sustainable Facility Programs
For safety managers operating in facilities pursuing LEED certification, green purchasing policies, or ESG-aligned procurement, the earplug dispenser on the wall is a visible signal. The Moldex 6646 Check Price on Amazon → Goin' Green PlugStation makes that signal substantive: it dispenses Goin' Green earplugs, Moldex's soft foam plug formulated without polyvinyl chloride (PVC), using a Smart Fit foam that conforms to the ear canal without the harsh recovery force common in standard foam earplugs. NRR 33. Green color. And the environmental claim is real, not marketing — PVC elimination removes chlorinated polymer content from every pair your facility consumes.
OSHA 29 CFR 1910.95: Hearing conservation programs must provide hearing protection at no cost to workers exposed at or above 85 dB TWA. The Goin' Green earplugs at NRR 33 meet the attenuation requirements of virtually all single-protection industrial scenarios.
What Are Goin' Green Earplugs?
Goin' Green is Moldex's PVC-free foam earplug line. Standard foam earplugs — including many industry-standard cylindrical plugs — are formulated from polyurethane foam or, in some cases, PVC-blended materials. Moldex's Goin' Green uses a proprietary "Smart Fit" foam formulation that is:
- PVC-free: No polyvinyl chloride in the foam matrix. This is relevant for facilities with halogen-restricted purchasing policies, green chemistry programs, or materials disclosure requirements.
- Soft and low-pressure: Smart Fit foam expands gently after insertion, creating a comfortable seal without the aggressive outward pressure of high-recovery foams. Workers report lower ear fatigue over extended wear periods compared to standard foam earplugs.
- Green colored: The distinctive green color allows visual compliance verification during supervisor walk-throughs, similar to the high-visibility function of SparkPlugs yellow-green, though in a foam rather than multi-flange format.
For comparison, the Mellows earplug (available in the Moldex 6846 PlugStation) prioritizes ultra-low pressure at NRR 30. The Pura-Fit (available in the Moldex 6844 PlugStation) uses a smooth-skin coating for allergen reduction. Goin' Green sits in between: soft comfort with maximum NRR 33 attenuation and PVC-free material chemistry.
Goin' Green Specifications
| Specification | Detail |
|---|---|
| SKU | 6646 (PlugStation) |
| Earplug model | Goin' Green |
| NRR | 33 dB |
| Real-world attenuation (NRR÷2) | ~16.5 dB |
| Style | Cylindrical foam (Smart Fit) |
| Color | Green |
| Material | PVC-free foam |
| Corded | No (uncorded; see 6647 for corded) |
| Dispenser capacity | 250 pairs |
| Wall-mount bracket | Included |
| NIOSH listed | Yes |
Why PVC-Free Matters for Facility Procurement
PVC (polyvinyl chloride) is one of the most widely scrutinized polymers in green chemistry frameworks. Programs like the Cradle to Cradle certification, the U.S. Green Building Council's LEED materials credits, and corporate restricted substances lists (RSLs) frequently target halogenated polymers, of which PVC is the most common.
Switching your earplug dispenser from a PVC-containing format to Goin' Green produces a documentable reduction in halogenated polymer consumption proportional to your annual earplug volume. For a facility consuming 50,000 pairs per year, this is a meaningful entry in your environmental impact reporting — and it is a change that costs nothing in compliance effectiveness, since the Goin' Green NRR 33 matches the highest-rated foam earplugs available.
LEED Purchasing Credit Applicability
LEED v4.1 Existing Buildings (LEED O+M) includes a Purchasing credit (Purchasing — Ongoing Consumables) that rewards facilities for procuring products meeting environmental standards. While earplugs as a category may fall under facility maintenance consumables rather than specific product categories, the documentation of PVC-free procurement supports broader Environmentally Preferable Purchasing (EPP) programs that LEED O+M and ISO 14001 environmental management systems recognize.
Smart Fit Foam vs. Standard Foam: Comfort and Compliance
Worker acceptance is the single largest compliance variable in any hearing conservation program. An earplug that workers find uncomfortable will be inserted incorrectly, removed early, or not worn at all — and the highest NRR in the world provides zero protection in a pocket. Smart Fit foam's gentler recovery force directly addresses this.
| Foam Type | Recovery Force | NRR | Best For |
|---|---|---|---|
| Standard polyurethane | High | 29–33 | Short-duration wear |
| Goin' Green Smart Fit | Medium-low | 33 | Extended wear, green programs |
| Mellows (6846) | Very low | 30 | Maximum comfort, ear sensitivity |
| Pura-Fit (6844) | Medium | 33 | Latex/allergen sensitivity |
NRR 33 Performance: OSHA Compliance Calculations
| Noise Level | Goin' Green Effective Exposure (NRR÷2) | OSHA Status |
|---|---|---|
| 90 dB | 73.5 dB | Compliant |
| 95 dB | 78.5 dB | Compliant |
| 100 dB | 83.5 dB | Compliant |
| 105 dB | 88.5 dB | Monitor |
| 110 dB | 93.5 dB | Double protection required |
For NIOSH guidance on hearing protection attenuation requirements, see our NIOSH standards guide.
Ideal Facilities for the 6646 Goin' Green PlugStation
- LEED-certified or LEED-pursuing facilities: Documentable PVC-free procurement for environmental credit programs.
- Pharmaceutical and biotech manufacturing: Restricted substances policies often target halogenated materials.
- Food processing with green procurement mandates: Corporate sustainability commitments extend to all consumable PPE.
- Electronics manufacturing: RoHS and REACH frameworks condition procurement culture around halogen reduction.
- Educational institutions and government facilities: Environmentally Preferable Purchasing (EPP) policies apply to all consumable purchases.
Corded Variant: The 6647 PlugStation
If your facility needs Goin' Green earplugs in corded format — for workers moving between noise and non-noise zones — see the Moldex 6647 Goin' Green PlugStation. The corded version provides the same Smart Fit foam and PVC-free chemistry with the neck-wear convenience of a tethered pair.
How to Refill the Moldex 6646 PlugStation
- Press both front-panel release tabs simultaneously and open the dispenser door.
- Remove any remaining Goin' Green pairs from the magazine channel.
- Load Goin' Green refill pairs vertically into the channel. Pairs should load without forcing.
- Close the panel until both tabs click into place.
- Test-dispense one pair to confirm smooth operation.
Use only Goin' Green refill pairs in the 6646. Do not load SparkPlugs, Pura-Fit, or other Moldex earplug models — each PlugStation is channel-matched to its specific earplug geometry.
PlugStation vs. EcoStation vs. Bulk Box
| Feature | 6646 PlugStation | EcoStation (bulk bag) | Bulk Box |
|---|---|---|---|
| Material | PVC-free Goin' Green | Depends on refill model | Depends on model |
| Dispense method | Individual pairs | Hopper bulk | Open box |
| Hygiene | High | Medium | Low |
| Wall-mount | Yes | Yes | No |
| Cost per pair | Higher | Lower | Lowest |
If your facility needs high-volume bulk dispensing, the Moldex 6702 Softies EcoStation and Moldex 6706 Pura-Fit EcoStation are bulk-bag alternatives for foam earplugs.
Frequently Asked Questions
What does "Goin' Green" mean — is the earplug actually eco-friendly?
Yes, the Goin' Green name reflects a specific material difference: the earplug foam is formulated without PVC (polyvinyl chloride), a halogenated polymer targeted by green chemistry programs. This is a documentable material change, not purely marketing.
What is the NRR of Goin' Green earplugs?
NRR 33, the same as SparkPlugs and Pura-Fit. Under NIOSH's NRR÷2 derating, this provides approximately 16.5 dB of real-world noise reduction.
How does Smart Fit foam differ from standard foam?
Smart Fit foam uses a lower-recovery-force formulation that expands more gently after insertion. This reduces the outward pressure felt in the ear canal compared to high-recovery polyurethane foams, improving comfort during extended wear without sacrificing NRR.
Does PVC-free foam affect the NRR rating?
No. The NRR is a lab-measured acoustic performance figure. Goin' Green achieves NRR 33 without PVC — matching the highest-rated earplugs in the Moldex lineup. PVC-free is a material chemistry change, not a performance compromise.
Is the 6646 PlugStation LEED-credit eligible?
Goin' Green's PVC-free formulation supports Environmentally Preferable Purchasing (EPP) documentation relevant to LEED O+M purchasing credits and ISO 14001 procurement records. Consult your LEED project administrator for specific credit applicability.
What is the capacity of the 6646 PlugStation?
250 pairs. For higher-volume Goin' Green dispensing at the same station, consider running two 6646 dispensers side by side.
Is there a corded version of the Goin' Green PlugStation?
Yes. The Moldex 6647 PlugStation dispenses corded Goin' Green earplugs, ideal for workers who move between noise and non-noise zones.
Are Goin' Green earplugs latex-free?
Yes. Goin' Green earplugs are latex-free. The PVC-free foam formulation does not contain latex or natural rubber.
How do I insert Goin' Green foam earplugs correctly?
Roll the earplug between clean fingers to compress it into a thin cylinder. Pull the outer ear up and back, insert the compressed plug, and hold it with a finger for 20–30 seconds while the Smart Fit foam slowly expands to fill the canal. A proper fit should significantly muffle ambient noise.
What OSHA standard requires hearing protection in my facility?
OSHA 29 CFR 1910.95 requires a hearing conservation program at 85 dB TWA and mandatory hearing protection at 90 dB TWA for workers. The 6646 PlugStation earplug at NRR 33 satisfies the attenuation requirement for most industrial environments.
Can I use Goin' Green earplugs in pharmaceutical clean rooms?
The PVC-free formulation may satisfy material restrictions in pharmaceutical environments, but verify against your facility's specific clean-room contamination and material protocols. The PlugStation's individual dispensing format supports clean-room hygiene better than open bulk-bag dispensers.
How does the green color help with compliance monitoring?
Green is a visually distinctive earplug color that supervisors can identify from 10–15 feet during a floor walk-through. This allows non-disruptive compliance observation without stopping workers, satisfying the observation requirement of OSHA 1910.95(i)(4).
Does the 6646 include a wall-mount bracket?
Yes. The wall-mount bracket is included. Mount at approximately 60 inches from the floor at each hazard-zone entry point. Two anchor screws are required (not included).
What is the refill pair for the 6646 PlugStation?
Moldex Goin' Green uncorded refill pairs are the correct refill for the 6646 PlugStation. Use only model-matched refills — cross-model loading will jam the dispensing mechanism.
How does the 6646 compare to the Pura-Fit PlugStation?
Both use soft foam at NRR 33. The Goin' Green (6646) emphasizes PVC-free material chemistry; the Pura-Fit (6844) emphasizes a smooth skin-friendly surface coating. If your priority is green procurement, choose 6646. If your priority is allergen-sensitive worker comfort, choose 6844.
Where can I buy the Moldex 6646 Goin' Green PlugStation?
Check current pricing on Amazon Check Price on Amazon → or browse the WC Safety earplug collection. See the full hearing protection collection for all options.
Also explore: respirators, safety gloves, hard hats, safety glasses.
Pros & Cons
Pros
- NRR 33 ties the highest attenuation in Moldex's foam lineup, covering virtually all single-protection industrial noise scenarios under OSHA 1910.95
- PVC-free Smart Fit foam gives a documentable green-chemistry procurement story (LEED/EPP/RoHS-aligned facilities) at zero compliance cost
- Lower-recovery Smart Fit foam reduces ear-canal pressure for extended wear, improving worker acceptance versus high-recovery standard foam
- Wall-mounted 250-pair individual dispensing keeps pairs hygienic and supports hands-free, contamination-controlled access at hazard-zone entries
- Distinctive green color enables fast visual compliance checks during supervisor walk-throughs
- Bracket included and refillable, so the station amortizes across years rather than being disposable like a bulk box
Cons
- Cost-per-pair is higher than bulk-box or EcoStation bulk-bag foam, so high-volume programs pay a premium for the dispensing format
- Uncorded only — workers moving between noise and quiet zones need the corded 6647 instead
- Not metal-detectable, so it is unsuitable for food, pharma fill-line, or any contamination-critical area requiring detectable PPE
- Channel-matched to Goin' Green geometry only; you cannot cross-load SparkPlugs or Pura-Fit refills, locking you to one model per station
Who It's For
Buy it if:
- Safety managers running LEED-pursuing, ISO 14001, or green-procurement facilities that need documentable PVC-free PPE
- Operations standardizing a single high-NRR foam plug at every hazard-zone entry with hygienic wall dispensing
- Pharma, biotech, and electronics plants whose restricted-substances lists target halogenated polymers
- Facilities prioritizing worker comfort and extended-wear acceptance over absolute lowest cost-per-pair
Look elsewhere if:
- Cost-driven programs at very high annual volume that should compare bulk-box or EcoStation bulk-bag foam
- Food, pharma fill-line, or any area mandating metal-detectable earplugs
- Workers who repeatedly transition between noise and non-noise zones and need a corded, around-the-neck plug
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 NRR 33 overkill, or do I actually need the highest rating for my facility?
NRR 33 is the ceiling for foam earplugs, but your real-world protection is far lower. Using OSHA's (NRR-7)/2 estimate, NRR 33 yields about 13 dB of derated protection; NIOSH's simpler NRR÷2 yields about 16.5 dB. Standardizing on the highest-NRR plug gives you headroom so that even imperfect field insertion keeps workers compliant. Use our how to calculate the nrr you need walk-through against your measured TWA before assuming you need the maximum.
How does the 6646 Goin' Green compare to Moldex SparkPlugs for the same NRR?
Both can reach NRR 33, but they are different geometries. Goin' Green is a roll-down cylindrical foam plug requiring the roll-pull-hold insertion technique, while SparkPlugs are a push-to-fit multi-flange design that inserts without rolling. Compare the moldex 6604 sparkplugs review if you want a no-roll plug for dirty-hand environments; choose Goin' Green if you specifically need PVC-free foam chemistry.
Foam plug or reusable flanged plug — which is the better long-term value here?
Goin' Green is single-use foam: low unit cost, no cleaning, discarded after wear. Flanged reusable plugs cost more per pair but are washable and last weeks, lowering cost-per-shift in stable, clean settings. For dispenser-fed high-throughput access the disposable model wins on hygiene and simplicity; if you want washable options instead, browse reusable earplugs before committing a station to foam.
Can Goin' Green foam plugs be reused, or are they strictly single-use?
Treat them as single-use. Foam earplugs absorb earwax, skin oils, and grime that degrade the seal and raise infection risk on reinsertion. The whole point of a 250-pair station is fresh-pair access each shift. If you want a plug you wash and reuse, a flanged reusable design is the correct category, not foam.
Should I choose the uncorded 6646 or a corded version?
Pick uncorded (6646) when workers stay in a noise zone for the whole shift and a dangling cord could snag near rotating machinery. Pick the corded 6647 when staff move in and out of noise frequently and need to hang the pair around the neck between uses. Corded also cuts dropped-plug loss. Match the choice to worker movement patterns, not preference alone.
How does Goin' Green compare to Moldex Pura-Fit if both are NRR 33?
Both are soft NRR 33 foam, so attenuation is a tie. Goin' Green's differentiator is PVC-free green-chemistry material; Pura-Fit's is a smooth skin-friendly surface coating aimed at allergen-sensitive workers. If green procurement drives your decision, choose the 6646; if surface comfort for sensitive skin is the priority, read the moldex 6800 pura fit review instead.
Is a wall dispenser worth the higher cost-per-pair versus a bulk box?
The premium buys hygiene, accountability, and placement. Individual dispensing keeps unused pairs clean and lets you site fresh-plug access exactly at each hazard-zone entry, which improves wear rates — and a plug that gets worn correctly outperforms a cheaper one left in a pocket. For very high annual volume where unit cost dominates, compare bulk-box foam ear plugs and run the math on consumption.
When do I need earplugs plus earmuffs instead of the 6646 alone?
Single-protection foam at NRR 33 covers most industrial noise, but extreme exposure above roughly 100–105 dB TWA can require dual protection. You do not add the two NRRs; the combined benefit is typically only about 5 dB over the better single device. Our ear plugs vs ear muffs guide explains when to layer them and how to estimate combined attenuation honestly.
Are Goin' Green earplugs metal-detectable for food or pharma lines?
No. Goin' Green foam is not metal-detectable, so it is unsuitable for food processing, pharmaceutical fill lines, or any area where dropped PPE must be detected. If you need detectable plugs, look at a metal-detectable model such as the moldex 6615 sparkplugs metal detectable for those zones and reserve the 6646 for general industrial areas.
How does Goin' Green compare to softer, lower-NRR foam plugs for sensitive ears?
Goin' Green's Smart Fit already lowers recovery force versus standard high-recovery foam, but ultra-low-pressure plugs trade attenuation for comfort (often landing nearer NRR 28–30). If you have workers who cannot tolerate any canal pressure, a softer low-pressure plug may improve acceptance at a small NRR cost. Compare options in the best foam ear plugs roundup before downgrading attenuation.
Why does my measured protection fall short of NRR 33 in the field?
Lab NRR is a best-case figure from trained, supervised insertion. Real-world results depend on rolling the plug thin enough, the pull-up-and-back ear motion, and holding while the foam expands. Poor technique can cut effective protection by half or more. Train insertion with our how to insert foam earplugs steps and read what is nrr noise reduction rating explained to set realistic expectations.
How does the 6646 compare to Moldex Softies for a comfort-first program?
Softies is Moldex's soft, tapered foam aimed squarely at comfort and easy insertion, while Goin' Green adds the PVC-free material angle at the top NRR. If comfort and price lead your decision over green chemistry, the moldex 6600 softies review is the better starting point; choose Goin' Green when procurement specifically requires the halogen-free story.
Is the 6646 a good fit if I just need maximum attenuation regardless of sustainability?
It works, but you would be paying for the green-chemistry feature you do not need. If your only goal is the highest derated protection, compare the field across the highest nrr ear plugs guide — several NRR 33 foam plugs deliver identical attenuation without the PVC-free premium, so the 6646 makes most sense when sustainability documentation is part of the spec.
Will switching to Goin' Green change my OSHA hearing-conservation paperwork?
Functionally no — NRR 33 satisfies the attenuation side of an OSHA 1910.95 program exactly as other high-NRR foam does, so your noise monitoring, audiometric testing, and training records carry over. The only addition is on the procurement side, where the PVC-free attribute can feed Environmentally Preferable Purchasing records. Keep your full program documented and stock the broader hearing protection range for mixed needs.
How do I decide between the 6646 station and ordering disposable plugs in bulk bags?
Choose the station when you want hygienic, point-of-need dispensing with clear accountability and a clean wall presence for green-program optics. Choose bulk packaging when central distribution and lowest unit cost matter more than per-pair hygiene. Many facilities run both: stations at entry points, bulk for stockrooms. Compare formats across disposable ear plugs to balance hygiene against cost for your layout.
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 — guidance reflects current OSHA, NIOSH and ANSI practice.
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.
Ratings combine published specs, hands-on familiarity, and verified customer data where available; we do not fabricate lab tests.
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