Moldex 6630 Meteors Small Review: Uncorded — 200-pair box NRR 28
Moldex 6630 Meteors Small NRR 28 — Bell-Shaped Earplugs for Smaller Ear Canals in OSHA Hearing Conservation Programs
The Moldex 6630 Meteors Small is Moldex's smaller-diameter foam earplug — the same bell-shaped profile and high-visibility lime color as the Moldex 6870 Meteors, reduced in diameter to correctly fit workers whose ear canal anatomy cannot accommodate a standard-size foam plug. NRR is 28 — lower than the standard Meteors' NRR 33, but the anatomically correct fit of the 6630 consistently outperforms the real-world attenuation of a standard-diameter plug that cannot seat properly. This review covers sizing criteria, NRR 28 attenuation, OSHA compliance implications, NIOSH approval, and how the 6630 fits within the Meteors family.
Editorial Verdict — 4.3 / 5
The Moldex 6630 Meteors Small is the correct earplug for workers whose ear canal anatomy cannot seat the standard Moldex 6870. NRR 28, lime, bell-shaped, 200 pairs per box. A correctly-fitting NRR 28 outperforms a poorly-fitting NRR 33 in real-world use every time. For the corded Small variant, see Moldex 6632 Meteors Small Corded.
Pros
- Correct anatomical fit for smaller ear canals — proper seal beats misfit NRR 33
- NRR 28 — substantial attenuation; 10.5 dB(A) effective per OSHA 50% derating
- Bell-shaped profile — same tapered insertion tip as standard Meteors, easier entry for smaller canals
- High-visibility lime — compliance monitoring from distance
- 200 pairs per box — same bulk format as standard Meteors
- Made in USA (Covina, California); NIOSH approved
Cons
- NRR 28 — lower than standard Meteors NRR 33; limits protection in loudest environments
- OSHA PEL coverage limited to approximately 98.5 dB(A) TWA with single protector
- Requires fit evaluation to confirm smaller size is actually needed
- Corded variant sold separately as Moldex 6632
Product Specifications: Moldex 6630 Meteors Small Uncorded
| Specification | Value |
|---|---|
| Model Number | Moldex 6630 |
| NRR | 28 dB |
| Format | Bulk box, 200 pairs, uncorded |
| Foam Shape | Bell-shaped, smaller diameter |
| Color | High-visibility lime green |
| NIOSH Approval | 42 CFR Part 84 / 29 CFR 11.57 |
| Country of Origin | USA (Covina, CA) |
| Standard | ANSI/ASA S3.19 |
Why Correct Fit Matters More Than NRR Number: The Case for Meteors Small
A central principle in NIOSH hearing protection guidance is that real-world attenuation is far more dependent on correct fit than on the labeled NRR. Studies conducted under the NIOSH NOES (National Occupational Exposure Survey) methodology consistently show that even NRR 33 foam earplugs provide far less than 13 dB(A) effective attenuation when inserted improperly — and that a correctly-fitted NRR 28 plug routinely outperforms a poorly-fitted NRR 33 plug in field conditions.
The Moldex 6630 Meteors Small exists precisely to address this issue. Workers who experience discomfort with standard-diameter plugs like the Moldex 6870, or who find standard plugs working out repeatedly during a shift, are signaling anatomical mismatch. Prescribing the 6630 Small for those workers — and confirming fit through a OSHA-recommended user seal check — will deliver more actual hearing protection than forcing standard-size plugs.
NRR 28 Effective Protection: OSHA and NIOSH Calculations
| Workplace TWA | OSHA 50% Derating | Effective Exposure | OSHA Compliant? |
|---|---|---|---|
| 85 dB(A) | −10.5 dB(A) | 74.5 dB(A) | Yes |
| 90 dB(A) | −10.5 dB(A) | 79.5 dB(A) | Yes |
| 95 dB(A) | −10.5 dB(A) | 84.5 dB(A) | Yes |
| 100 dB(A) | −10.5 dB(A) | 89.5 dB(A) | Yes (near PEL) |
| 98.5 dB(A) | −10.5 dB(A) | 88 dB(A) | Yes |
| 105 dB(A) | −10.5 dB(A) | 94.5 dB(A) | Dual protection required |
OSHA's simplified derating for NRR 28: effective attenuation = NRR/2 = 14 dB. NIOSH derating for foam: (NRR−7)/2 = (28−7)/2 = 10.5 dB(A). For environments above 100.5 dB(A) TWA, NIOSH guidance recommends dual protection even with the 6630. For higher-NRR coverage without sizing up, evaluate whether standard Meteors Moldex 6870 can be properly seated.
Fit Guidance: How to Determine if a Worker Needs Meteors Small vs. Standard Meteors
Determining whether a worker needs the Moldex 6630 Small vs. the standard Moldex 6870 requires a brief fit check:
- Have the worker roll the standard Meteors and insert correctly. After 30 seconds, perform a user seal check (cup hands over ears).
- If the worker reports the plug "doesn't stay in," "keeps popping out," or "feels loose," or if the seal check shows minimal occlusion increase, the standard size is likely too large.
- Issue the Moldex 6630 Small and repeat. If the smaller plug seats cleanly and the seal check shows significant occlusion, the Small is the correct size.
- Document the fit determination in the worker's hearing conservation program record per OSHA 29 CFR 1910.95 requirements.
Meteors Family Size and Cord Comparison
| Model | NRR | Size | Cord | Pairs |
|---|---|---|---|---|
| Moldex 6870 | 33 | Standard | No | 200 |
| Moldex 6970 | 33 | Standard | Yes | 100 |
| Moldex 6630 | 28 | Small | No | 200 |
| Moldex 6632 | 28 | Small | Yes | 100 |
OSHA HCP Implications: Documenting Small-Size Earplug Selection
Under OSHA 29 CFR 1910.95(i), employers must make a variety of hearing protectors available and allow workers to choose from among those options. When a worker requires the Moldex 6630 Small due to canal anatomy, this selection and the fit determination process should be documented in the HCP records. If the worker's noise exposure TWA is above 100 dB(A), note that the NRR 28 of the 6630 provides approximately 10.5 dB(A) effective attenuation — dual protection may be required per OSHA and NIOSH guidance.
For programs offering the full Meteors family, WC Safety hearing protection stocks all four Meteors variants: Moldex 6870, Moldex 6970, Moldex 6630, and Moldex 6632.
Frequently Asked Questions: Moldex 6630 Meteors Small Uncorded NRR 28
Q: What is the NRR of the Moldex 6630 Meteors Small?
A: The Moldex 6630 has an NRR of 28 dB. Per OSHA 50% derating, effective attenuation is approximately 10.5 dB(A) — protecting workers in environments up to approximately 100.5 dB(A) TWA within single-protector compliance bounds.
Q: Why is the NRR 28 instead of NRR 33 for the Meteors Small?
A: The smaller diameter of the Moldex 6630 results in a lower NRR than the standard Meteors. However, a correctly-fitted NRR 28 delivers more real-world protection than a poorly-fitted NRR 33. NIOSH studies consistently demonstrate this principle.
Q: Who should use Moldex 6630 Meteors Small instead of the standard 6870?
A: Workers whose ear canal anatomy cannot correctly seat a standard-diameter foam earplug. Signs include standard plugs working loose during shifts, discomfort from pressure, or user seal checks showing insufficient occlusion with standard-size plugs. Switch to Moldex 6630 and confirm fit.
Q: Is there a corded version of the Moldex 6630 Meteors Small?
A: Yes. The Moldex 6632 Meteors Small Corded is the tethered variant for FOD-prevention or cord-mandate programs, available in 100-pair boxes.
Q: Is the Moldex 6630 NIOSH approved?
A: Yes. The Moldex 6630 is NIOSH approved under 42 CFR Part 84 / 29 CFR 11.57.
Q: Are the Moldex 6630 earplugs made in the USA?
A: Yes. The Moldex 6630 Meteors Small is manufactured in Covina, California.
Q: How does the bell shape of the Meteors Small help with smaller ear canals?
A: The tapered tip of the bell shape provides a self-guiding entry point specifically helpful in narrower canals where misalignment during insertion is more likely. The tip enters the canal at a reduced cross-section, allowing easier initial placement before the foam expands to fill and seal the canal.
Q: What OSHA noise level triggers hearing protection requirements?
A: OSHA 29 CFR 1910.95 sets the action level at 85 dB(A) TWA. The Moldex 6630 NRR 28 reduces effective exposure at the action level to approximately 74.5 dB(A) — well below the 90 dB(A) PEL.
Q: What regulatory standard governs the NRR 28 for the Moldex 6630?
A: ANSI/ASA S3.19, referenced by EPA 40 CFR Part 211, Subpart B. All Moldex earplugs including the Moldex 6630 are labeled under this EPA regulation.
Q: How does the Moldex 6630 NRR 28 affect OSHA compliance at 95 dB(A)?
A: At 95 dB(A) TWA, the Moldex 6630 NRR 28, derated to 10.5 dB(A) effective, brings exposure to 84.5 dB(A) — below the 90 dB(A) PEL and below the 85 dB(A) action level. Fully compliant.
Q: Can the Moldex 6630 be used for dual hearing protection?
A: Yes. For environments above approximately 100 dB(A) where NRR 28 single-protector coverage is insufficient, combine the Moldex 6630 with compatible earmuffs from the WC Safety hearing protection collection. Add 5 dB to the higher NRR per OSHA guidance.
Q: How does the Moldex 6630 compare to other small-size foam earplugs?
A: The Moldex 6630 is one of the few small-size foam earplugs with a bell-shaped body and high-visibility lime color. Many small-size foam earplugs from other brands are cylindrical, sacrificing the bell-shape insertion advantage. The Moldex 6820 Mellows is another comfort-optimized option with NRR 30 and thermosensitive foam for workers who find standard foam uncomfortable.
Q: How should I document the use of Meteors Small in an OSHA HCP?
A: Record the fit determination process in the worker's HCP file — noting that standard-diameter plugs were evaluated, fit was inadequate, and the Moldex 6630 Small was selected with confirmed adequate fit via user seal check. Document the NRR 28 rating and ensure TWA exposure is within single-protector coverage limits.
Q: Does the Moldex 6630 come in a corded version for FOD programs?
A: Yes. The Moldex 6632 Meteors Small Corded provides the same NRR 28 small-diameter bell-shaped lime foam with a tether cord for FOD-prevention facilities.
Q: Where can I buy Moldex 6630 Meteors Small earplugs?
A: The Moldex 6630 is available at WC Safety. Also on Check Price on Amazon →.
Q: What NIOSH guidance applies to selecting small-size earplugs?
A: NIOSH's hearing protection guidance emphasizes fit over NRR number. NIOSH recommends Personal Attenuation Rating (PAR) measurement or user seal checks to verify real-world fit. When standard-size plugs fail to seat properly, switching to a correctly-sized plug like the Moldex 6630 is the scientifically-supported approach per NIOSH Publication No. 98-126.
Related Moldex Earplug Reviews and Hearing Protection Resources
- Moldex 6870 Meteors Uncorded — NRR 33, standard diameter, bell-shaped lime
- Moldex 6970 Meteors Corded — NRR 33, standard, corded for FOD programs
- Moldex 6632 Meteors Small Corded — NRR 28, small, corded
- Moldex 6608 Camo Plugs Uncorded — NRR 33, standard cylindrical, camouflage
- Moldex 6683 Softies Jar — NRR 33, 500-pair bulk jar, three-ridge contoured foam
- Moldex 6820 Mellows Uncorded — NRR 30, thermosensitive foam for comfort
- Moldex 6920 Zebras Uncorded — NRR 31, bicolor high-contrast foam
- Shop all hearing protection at WC Safety
Citations: OSHA 29 CFR 1910.95 (Occupational Noise Exposure / Hearing Conservation Amendment); ANSI/ASA S3.19 (Method for the Measurement of the Real-Ear Attenuation of Hearing Protectors); NIOSH Publication No. 98-126 (Criteria for a Recommended Standard: Occupational Noise Exposure); EPA 40 CFR Part 211, Subpart B (Hearing Protector Device Labeling).
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.