Moldex 6985 Glide Soothers Review — NRR 31 Corded Twist-In Foam Earplug, 100 pairs

Moldex 6985 Glide Soothers Corded Review: Maximum NRR 33 Twist-In With Loss-Prevention Cord?

The Moldex 6985 Glide Soothers Corded is the corded version of the 6980 Glide Soothers — NRR 33, twist-in insertion, with a flexible cord connecting both earplugs. It occupies the top of the Moldex disposable earplug line: maximum attenuation + no-roll convenience + loss prevention cord. For hearing conservation programs serving 100+ dB(A) environments where earplug loss is a cost concern, the 6985 is the complete package.

Specifications

Feature	Details
Model	6985
NRR	33
Insertion	Twist-in (Glide system)
Corded	Yes
NIOSH Approval	29 CFR Part 11.57
Effective Protection	13 dB(A) OSHA method

Three-Way Advantage: NRR 33 + Twist-In + Cord

• NRR 33: Maximum attenuation for 100-103 dB(A) environments; covers the margin where NRR 30 falls short
• Twist-in insertion: Eliminates under-rolling; achieves closer to labeled NRR in real-world use; reduces contamination in food/pharma
• Cord: Prevents loss; allows hang-around-neck during noise breaks; prevents foreign object risk in machinery

OSHA Hearing Conservation Requirements: When Are Earplugs Mandatory?

OSHA 29 CFR 1910.95 (General Industry) requires employers to take action when workers are exposed to noise at or above specific thresholds:

Noise Level (TWA)	Required Action
85 dB(A) or above	Action Level: Establish Hearing Conservation Program; provide hearing protection; audiometric testing
90 dB(A) or above	PEL: Engineering/administrative controls required first; hearing protection mandatory
100 dB(A) or above	2-hour daily limit without protection; must use hearing protection
115 dB(A) or above	15-minute limit; double protection often required

The action level (85 dB(A)) triggers the full hearing conservation program requirement: noise exposure monitoring, baseline and annual audiometric testing, hearing protection provision, employee training, and recordkeeping. Many employers issue hearing protection to all workers in any area above 85 dB(A) regardless of measured TWA.

Understanding NRR: The Noise Reduction Rating Explained

Every NIOSH-approved earplug carries an NRR — the Noise Reduction Rating tested per ANSI S12.6 Method A (experimenter-supervised fit). Understanding how NRR translates to real-world protection is critical for compliance:

• OSHA method (50% derating): Effective dB = (NRR − 7) ÷ 2. For NRR 30: (30 − 7) ÷ 2 = 11.5 dB effective attenuation
• NIOSH method (75% derating for foams): Even more conservative — NIOSH recommends assuming only 25% of labeled NRR in real programs
• Maximum TWA with NRR 30 (OSHA method): 90 dB(A) PEL + 11.5 dB = 101.5 dB(A). At exposures above 101.5 dB(A), NRR 30 alone is insufficient; double protection or higher-NRR devices are needed

The gap between labeled NRR and real-world protection exists because laboratory testing uses trained subjects and careful supervised insertion. In the field, workers insert earplugs quickly, sometimes in poor light, without supervision — resulting in significantly less attenuation than the label suggests. This is why NIOSH derates foam earplugs more aggressively than other protection types.

Foam Earplug Insertion Technique: The Difference Between Full and Half Protection

Improper insertion is the single largest cause of earplug underprotection in hearing conservation programs. Studies have shown that workers who believe they are properly wearing foam earplugs often achieve only 50-60% of labeled NRR. Proper technique:

• Step 1 — Clean hands: Dirty hands introduce bacteria into the ear canal; always insert with clean hands
• Step 2 — Roll (for roll-and-insert types): Roll the earplug into a tight, thin cylinder — tighter is better for deep insertion and proper expansion
• Step 3 — Pull the ear: Reach over your head with the opposite hand and pull the top of your ear back and upward; this straightens the ear canal for deeper, more sealed insertion
• Step 4 — Insert deeply: Insert the rolled earplug deep enough that the end sits at or below the ear canal entrance; deep insertion is critical for achieving labeled NRR
• Step 5 — Hold: Keep holding the earplug in place for 20-30 seconds while the foam expands and fills the canal
• Step 6 — Check fit: Cup both hands over your ears and release — properly seated earplugs will produce a noticeable hollow, muffled sound change. If you hear little difference, reinsert

Browse all Moldex earplugs or see the full earplug selection at WC Safety including foam, banded, and reusable options.

Frequently Asked Questions

Noise-Induced Hearing Loss: What Workers and Safety Managers Must Know

Noise-induced hearing loss (NIHL) is the most prevalent occupational illness in the United States. NIOSH estimates that approximately 22 million US workers are exposed to hazardous noise annually. NIHL is:

• Permanent: Unlike some occupational diseases, NIHL cannot be reversed. Hair cells in the cochlea, once damaged, do not regenerate. This is why prevention is the only effective strategy.
• Progressive: Hearing loss accumulates over years of exposure. Workers may not notice significant hearing difficulty until their late career, when damage has been accumulating for decades.
• Preventable: With consistent use of properly rated hearing protection and engineering controls, NIHL is almost entirely preventable. The technology and products exist — compliance is the variable.
• High-frequency first: Early NIHL characteristically affects the 3000-4000 Hz range — the frequencies most important for understanding speech consonants. Workers notice they can "hear" people speaking but cannot understand them clearly. This "cookie bite" pattern on audiogram is a warning sign of noise damage.

The audiometric testing required by OSHA 1910.95 is specifically designed to detect this pattern early — when intervention (better hearing protection, reduced exposure) can prevent further loss. A Standard Threshold Shift (STS) detected on audiogram is a mandatory trigger for program review and protective action under OSHA requirements.

Double Hearing Protection: When NRR 30 Is Not Enough

For extremely loud environments (above 103 dB(A) TWA), even NRR 33 earplugs may be insufficient as sole protection. OSHA and NIOSH recommend dual hearing protection — wearing both earplugs and earmuffs simultaneously — when:

• Measured TWA exceeds 105 dB(A)
• Impulse peak levels exceed 140 dB(P)
• Engineering controls have reduced noise to the extent feasible but residual exposure remains above 103 dB(A)

Combined NRR for dual protection is NOT the sum of both NRR values. The combination adds approximately 5 dB of protection beyond the higher-rated device alone. For NRR 30 earplugs + NRR 25 earmuffs: effective protection ≈ 13 + 5 = 18 dB (OSHA method). Select the combination that brings effective exposure below 90 dB(A).

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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.