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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 6647 Goin' Green PlugStation Review: 500-Pair Earplug Dispenser (NRR 33)

WC Safety Editorial Verdict: 4.4/5

The Moldex 6647 Goin' Green PlugStation is the corded counterpart to the uncorded 6646 dispenser, pairing Moldex's PVC-free Smart Fit foam with an NRR 33 rating and a hygienic neck tether that keeps removed plugs off the floor. We rate it a strong buy for facilities running 5S housekeeping, food, or pharma zone-transition workflows where dropped earplugs are a contamination and slip liability — the corded format meaningfully raises re-don compliance under hearing protection programs. As with any high-NRR foam plug, plan to your real-world attenuation, not the label: NIOSH derates foam by ~25% and OSHA estimates protection at (NRR-7)/2, so the lab 33 dB lands near 16 dB in practice — still ample for most NRR 33 ear plugs use cases.

Moldex 6647 Corded Goin' Green PlugStation Review: Enforcing No-Earplug-on-Floor Policies Without Sacrificing Comfort

Dropped earplugs create two problems: a slip hazard and a lost-protection event. In facilities with strict 5S or lean housekeeping standards, an earplug on the production floor represents a housekeeping violation, a potential contamination incident in food or pharma environments, and a compliance gap if the worker does not replace it. The Moldex 6647 Check Price on Amazon → Goin' Green PlugStation addresses this with corded versions of Moldex's PVC-free Smart Fit foam earplugs — when a worker removes their plugs during a communication break, the cord keeps the pair around the neck rather than at risk on the floor.

OSHA 29 CFR 1910.95: Workers exposed at or above 85 dB TWA must have hearing protection available. Workers at or above 90 dB TWA must wear it. In zone-transition facilities, corded earplugs dramatically reduce the practical barriers to re-donning protection when re-entering noise areas.

What Is the Moldex 6647 PlugStation?

The 6647 is a wall-mounted individual earplug dispenser loaded with 250 pairs of corded Goin' Green earplugs. The earplug body is identical to the uncorded version in the Moldex 6646 PlugStation: PVC-free Smart Fit foam, NRR 33, green color, latex-free. The cord — a hygienic polymer tether connecting the two earplug bodies — is the only functional addition. It is the same approach used in the Moldex 6644 corded SparkPlugs PlugStation, applied to a foam earplug format.

Specifications

Specification Detail
SKU 6647 (PlugStation, corded)
Earplug model Goin' Green (corded)
NRR 33 dB
Real-world attenuation (NRR÷2) ~16.5 dB
Style Cylindrical foam (Smart Fit, PVC-free)
Color Green
Cord type Hygienic polymer tether (latex-free)
Dispenser capacity 250 pairs
Wall-mount bracket Included
NIOSH listed Yes

The "No Earplug on Floor" Policy: Why Corded Plugs Enforce It Passively

Implementing a no-earplug-on-floor policy through instruction alone requires active enforcement — supervisors must watch for dropped plugs and address violations. Corded earplugs enforce the same policy passively: because the plugs cannot fall independently of the cord, and the cord is worn around the neck, a removed pair hangs safely rather than landing on a production surface.

Facilities where this matters most:

  • Food and beverage manufacturing: An earplug in a product stream is a foreign material incident under HACCP protocols. The cord physically prevents this scenario for earplugs removed between tasks.
  • Pharmaceutical manufacturing: GMP environments require foreign particle controls. Corded earplugs reduce the probability of an earplug becoming a contaminant during handling.
  • 5S / lean manufacturing floors: Dropped earplugs are a common 5S audit finding. Corded formats remove this finding vector.
  • Slippery or wet floors (food processing, chemical plants): A foam earplug on a wet floor is a slip hazard. The cord eliminates the dropping mechanism.

Comfort Advantage for Frequent Removal and Re-insertion

Corded earplugs are removed more frequently than uncorded — precisely because the cord makes re-insertion easy and safe. This higher removal frequency makes earplug comfort during re-insertion more important than in a set-it-and-forget-it uncorded program.

Goin' Green's Smart Fit foam is particularly well-suited to frequent re-insertion:

  • The low-recovery foam rolls down quickly without requiring sustained finger pressure.
  • After removal, the foam returns to its natural shape within 30–60 seconds, ready for clean re-insertion.
  • Workers wearing gloves can roll and insert Smart Fit foam more easily than high-recovery polyurethane foams that require more force to compress.

For workers who still find foam re-insertion difficult while gloved, see the Moldex 6875 Meteors PlugStation, which uses a flanged design with improved gloved-insertion ergonomics.

NRR 33 and OSHA Compliance

Environment Noise Level Effective Exposure (NRR÷2) OSHA Status
88 dB 71.5 dB Compliant
95 dB 78.5 dB Compliant
100 dB 83.5 dB Compliant
107 dB 90.5 dB Consider double protection

See the NIOSH standards guide for the full derating methodology. For environments above 105 dB, pairing earplugs with earmuffs from the hearing protection collection provides additional attenuation.

PVC-Free in a Corded Format: Environmental Procurement Value

The sustainability argument for Goin' Green (covered in depth in the 6646 uncorded review) applies equally to the corded 6647. In a corded program, however, there is an additional environmental angle: corded earplugs reduce per-pair consumption, because workers who keep the pair around their neck throughout the shift draw only one pair — not 1.5 or 2 as is common in uncorded programs with zone transitions.

Lower consumption volume means less material disposal per shift. For a green procurement program, this pairs with the PVC-free formulation to create a compounding environmental benefit.

How to Refill the Moldex 6647 PlugStation

  1. Depress both front-panel release tabs simultaneously and swing the door open.
  2. Remove any remaining corded Goin' Green pairs from the magazine channel.
  3. Load corded Goin' Green refill pairs into the channel with the cord loop oriented toward the dispense opening. Pairs should stack freely.
  4. Close the panel until both tabs click into place.
  5. Pull one pair to confirm smooth dispensing.

Use only corded Goin' Green refill pairs. Cross-loading uncorded pairs or a different earplug model will jam the dispensing mechanism.

PlugStation vs. EcoStation vs. Bulk Box

Feature 6647 PlugStation EcoStation (bulk) Bulk Box (corded)
Material PVC-free Goin' Green corded Varies by model Varies
Dispense method Individual pairs Hopper bulk Open box
Floor-drop prevention High (corded) Low Low
Hygiene High Medium Low
Cost per pair Higher Lower Lower

For high-volume foam earplug dispensing via EcoStation, see the Moldex 6702 Softies EcoStation and Moldex 6706 Pura-Fit EcoStation.

Goin' Green and Related PlugStation Reviews:
Moldex 6646 Goin' Green (uncorded) | Moldex 6644 SparkPlugs (corded) | Moldex 6648 Camo Plugs PlugStation | Moldex 6847 Mellows PlugStation

Frequently Asked Questions

What is the NRR of the 6647 Goin' Green corded earplugs?
NRR 33. The cord does not affect acoustic performance. NIOSH NRR÷2 derating gives approximately 16.5 dB real-world attenuation.
How does the cord prevent earplugs from falling on the floor?
The cord connects both earplug bodies. When a worker removes the plugs, the pair hangs from the neck cord rather than being set down or pocketed. Workers cannot drop a corded pair to the floor without also removing the cord from around their neck.
Is PVC-free foam less durable than standard foam?
No. PVC-free refers to the polymer chemistry of the foam, not its durability. Goin' Green's Smart Fit foam is designed for the same daily-use demands as standard polyurethane foam earplugs. In corded programs where pairs are reused through the shift, the foam recovers cleanly between insertions.
Can Goin' Green corded earplugs be cleaned and reused across shifts?
Technically yes — the foam is washable. However, most programs establish a one-pair-per-shift policy for hygiene. In corded programs, workers are more likely to bring their pair through the full shift, so reuse across shifts is less common than single-shift use.
Are the cords on the 6647 earplugs a machinery entanglement hazard?
Like all corded PPE, the cord must not contact rotating machinery. Establish a facility protocol requiring workers to tuck the cord inside their collar during machine operation. This is standard procedure for corded hearing protection in any format.
Does the 6647 come with a wall-mount bracket?
Yes. The wall-mount bracket is included. No additional hardware purchase is needed for the dispenser. Two anchor screws are required for wall installation.
How many pairs does the 6647 hold?
250 pairs. This is identical to the uncorded 6646. For higher-capacity corded Goin' Green dispensing at a single point, two 6647 dispensers can be mounted side by side.
What OSHA standard governs hearing protection availability?
OSHA 29 CFR 1910.95 requires hearing protectors to be made available at no cost to workers exposed at or above 85 dB TWA, and mandates wearing at or above 90 dB TWA. The 6647 PlugStation at NRR 33 meets the attenuation requirements for these thresholds.
How does the 6647 differ from the 6648 Camo Plugs PlugStation?
The 6647 uses corded Goin' Green foam (PVC-free, NRR 33, green). The Moldex 6648 uses Camo Plugs (multi-flange, NRR 33, camouflage). If comfort of foam insertion and sustainability are priorities, choose 6647. If multi-flange design or aesthetic fit with military/outdoor environments matters, choose 6648.
Are NIOSH standards met by Goin' Green corded earplugs?
Yes. Moldex Goin' Green corded earplugs are NIOSH-listed under 42 CFR Part 84 with NRR 33.
Is the 6647 appropriate for pharmaceutical GMP environments?
The individual dispensing format and corded design (reducing floor-drop contamination risk) make the 6647 more suitable than open bulk dispensers for GMP environments. Verify against your specific contamination control SOP before final specification.
Can workers with latex sensitivities use the 6647?
Yes. Both the foam earplug and the cord are latex-free. The PVC-free Smart Fit foam does not contain natural rubber latex.
Does corded format increase or decrease compliance rates?
Studies of corded vs. uncorded earplug programs in zone-transition facilities consistently show higher compliance rates with corded formats. The primary mechanism: workers who remove plugs for communication can return them to the ears immediately without searching pockets or drawing a new pair.
How do I handle a torn or broken cord on a 6647 earplug?
If a cord breaks, the pair becomes functionally uncorded. Discard and replace with a fresh pair from the dispenser. Do not attempt to repair cords — compromised cords may not hold the plugs safely during neck-wear.
Where can I buy the Moldex 6647 PlugStation?
Check current availability on Amazon Check Price on Amazon → or browse the WC Safety earplug collection. See all hearing protection options including safety glasses, hard hats, and respirators.
What is the best insertion technique for corded Goin' Green earplugs?
Hold the cord clear of your hands. Roll the earplug between clean fingers to compress. Pull the outer ear up and back with the opposite hand. Insert the compressed plug and hold with one finger for 20–30 seconds while the Smart Fit foam expands. The cord will hang naturally once the plug is seated.

Explore all WC Safety PPE categories: hearing protection, earplugs, gloves, hard hats. See our in-ear hearing protection for shooting guide for range applications.

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
  • Corded Goin' Green format keeps removed plugs off the floor — directly supports 5S housekeeping and reduces lost-protection events in zone-transition work
  • NRR 33 is at the top of the foam earplug range, giving generous derated headroom for high-dBA environments under OSHA 1910.95
  • PVC-free, latex-free Smart Fit foam offers a slow-recovery roll-down for a comfortable, well-sealed fit across most ear-canal sizes
  • Wall-mounted PlugStation dispenses one clean pair at a time, cutting cross-contamination versus reaching into a shared jar or bag
  • High-visibility green body makes seal/insertion compliance checks easy for supervisors on the floor
  • Single-SKU bulk dispenser format lowers per-pair cost and simplifies reordering for large crews
Cons
  • The polymer cord adds cost and bulk versus the uncorded 6646 — wasteful if workers never remove plugs mid-shift
  • As a disposable foam plug, each pair is single-use; corded does not mean reusable, so consumption stays high
  • Goin' Green is NOT metal-detectable, so it is unsuitable for food/pharma lines that require detectable PPE — those need the 6615-class SparkPlugs instead
  • Lab NRR 33 overstates field protection; without fit-testing, expect closer to ~16 dB by OSHA's (NRR-7)/2 method
  • Wall-mount dispenser commits you to a fixed station location, less flexible than pocket-pack distribution for mobile crews

Who It's For

Buy it if:

  • Facilities enforcing no-earplug-on-floor / 5S housekeeping policies that need a corded foam plug at a fixed dispensing point
  • Operations with frequent quiet-zone breaks where workers remove and re-don plugs repeatedly through a shift
  • High-dBA environments (90 dB+ TWA) needing top-tier NRR 33 foam attenuation under a hearing conservation program
  • Safety managers standardizing on PVC-free, latex-free disposable foam for large crews via a single bulk SKU
  • Buyers who want Moldex Smart Fit comfort but require the tether to control dropped-plug loss and slip hazards

Look elsewhere if:

  • Food and pharmaceutical production lines that mandate metal-detectable earplugs — Goin' Green is not detectable
  • Workers who keep plugs in continuously and never remove them mid-shift, where the cord adds cost with no benefit
  • Crews wanting a washable, multi-use plug — a reusable flanged earplug is the lower-waste choice here
  • Mobile or remote workers without a fixed wall location to mount the PlugStation dispenser

Related Resources

Frequently Asked Questions

Does the cord on the Moldex 6647 reduce the noise reduction rating versus the uncorded 6646?

No. The cord is a hygienic neck tether attached to the earplug bodies and does not change the foam or the seal, so the corded 6647 carries the same NRR 33 as the uncorded 6646. Attenuation comes from the in-canal foam, not the cord. Your real-world protection depends on fit quality, not on whether the pair is tethered. See how the rating is derived in our guide on what is NRR noise reduction rating explained.

How much real-world protection does NRR 33 actually give me?

Plan for far less than 33 dB. NIOSH applies a ~25% derate to foam plugs, and OSHA's estimate is (NRR-7)/2, which puts the 6647 near 13-16 dB of field attenuation for an average wearer. That is still strong for most industrial noise, but you should size protection to your measured TWA rather than the label. Walk through the math in how to calculate the NRR you need.

When should I choose the corded 6647 over the uncorded 6646?

Choose the corded 6647 when workers repeatedly remove plugs for communication or quiet-zone breaks and a dropped pair would be a slip hazard, contamination event, or lost-protection gap. If your crew keeps plugs in continuously through the shift, the uncorded 6646 saves cost with no downside. The earplug body and NRR 33 are identical between the two.

Is the Moldex 6647 Goin' Green reusable or single-use?

It is single-use disposable foam. The cord keeps a removed pair around the neck during a shift, but the plug itself is meant to be discarded daily or when soiled — corded does not mean washable. If you want a multi-use plug to cut consumption, look at a reusable flanged earplug instead of disposable foam.

Can I use Goin' Green earplugs on a food or pharmaceutical production line?

Only if your line does not require metal-detectable PPE. Goin' Green foam is not metal-detectable, so it cannot satisfy HACCP-style detectable-earplug rules. For food and pharma lines needing detectable protection, the metal-detectable SparkPlugs format such as the Moldex 6615 SparkPlugs metal detectable is the correct choice.

How does the 6647 Goin' Green compare to the Moldex Pura-Fit foam plug?

Both are top-NRR Moldex foam plugs, but Goin' Green is a PVC-free, green, eco-positioned plug while Pura-Fit is a tapered self-adjusting foam. Pura-Fit's taper suits a wide range of canal sizes with an easy roll-down. If you are weighing the families, compare the Moldex 6800 Pura Fit and its corded sibling the Moldex 6900 Pura Fit corded against the Goin' Green line.

Is the foam dispenser format worth it over a bag or jar of plugs?

For multi-worker sites, yes. The wall-mounted PlugStation dispenses one clean pair at a time, which reduces cross-contamination versus reaching into a shared jar and makes restocking and budgeting predictable with a single bulk SKU. A jar like the Moldex 6684 SparkPlugs jar suits desk-side or low-traffic points, while the PlugStation suits a fixed entry station.

How does Goin' Green compare to Moldex SparkPlugs for the same use case?

Goin' Green is a PVC-free foam plug, while SparkPlugs is a different foam line offered in plain, corded, and metal-detectable versions. If detectability or a specific comfort profile matters, SparkPlugs gives more format options — see the Moldex 6604 SparkPlugs, the corded Moldex 6654 SparkPlugs corded, or the Moldex 6615 SparkPlugs metal detectable for direct comparison.

Will NRR 33 be enough for my noise environment?

For most industrial settings, yes — NRR 33 is at the ceiling of the foam range. After derating to roughly 16 dB by OSHA's method, the 6647 protects comfortably below the 90 dB PEL for typical 95-100 dBA exposures. For extreme exposures, consider dual protection. Our highest NRR ear plugs guide and the ear plugs vs ear muffs comparison help you decide whether plugs alone suffice.

Does corded mean I can stop replacing plugs as often?

No. The cord controls where a removed pair goes, not how clean it stays. Single-use foam should still be discarded daily or sooner if soiled, compressed, or no longer recovering to full diameter. Reusing dirty foam degrades both hygiene and the seal that produces the rating. Insert each fresh pair correctly using how to insert foam earplugs.

How does the 6647 compare to a low-cost foam plug like Moldex Softies?

Softies is Moldex's economy bell-shaped foam plug, while Goin' Green is a PVC-free Smart Fit cylindrical foam with a higher comfort and eco positioning. If budget is the priority and detectability and the cord are not needed, the Moldex 6600 Softies or corded Moldex 6650 Softies corded are cheaper; the 6647 is the pick when you want the corded PlugStation and Smart Fit foam.

Is a corded foam plug better than corded muffs for zone-transition work?

It depends on don/doff frequency and headgear conflicts. Corded foam plugs re-don fast and pair with hard hats and face shields without interference, while muffs are quicker to seat and remove but bulkier under PPE. Many zone-transition crews prefer corded plugs for exactly this reason — weigh the trade-offs in ear plugs vs ear muffs.

Does the green color of the 6647 offer any compliance advantage?

Yes, practically. The high-visibility green body lets supervisors verify at a glance that plugs are inserted and seated, which supports observation-based compliance checks in a hearing conservation program. Color is a workflow benefit, not an attenuation factor — the NRR comes from the foam. Browse other options in the foam ear plugs collection.

How many workers can one PlugStation realistically serve before refilling?

That depends on shift length and how often plugs are replaced, but the bulk dispenser is sized for crew-level distribution at a fixed entry point rather than single-user supply. Budget one fresh pair per worker per shift as a baseline for disposable foam, and place the station at the noise-zone boundary so re-donning is frictionless. Compare bulk options across the disposable ear plugs range.

Should I standardize my whole site on the 6647, or mix formats?

Most sites mix. Use the corded 6647 at zone-transition entries and 5S-controlled areas, an uncorded plug like the 6646 where plugs stay in continuously, and a metal-detectable SparkPlugs SKU on food or pharma lines. Standardizing on one comfortable foam family while varying the cord/detectability feature keeps purchasing simple — start from the hearing protection collection to map your stations.

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: Dispenser, Goin' Green, Hearing Protection, Moldex, NRR 33, OSHA, PlugStation, Workplace Safety
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