General Safety Notice
Custom earplugs are designed to help reduce exposure to harmful noise levels and prevent noise-induced hearing loss when worn correctly.
They do not eliminate all sound and should not be used where complete hearing isolation may create safety risks, such as near moving vehicles or warning alarms. Select the Fen X Custom model that is fit for your specific activity.
Usage Instructions
Get to know the earplugs made for you.
1. Insert
2. Properly Seal
3. Check Your Fit
Remember!
Care & Maintenance
Making the most of your earplugs.
Noise Reduction Rating
What is NRR?
Noise Reduction Rating measures how effectively ear protection reduces noise, with higher values offering better protection.
How does it work?
NRR is based on lab tests and shows the decibel reduction of ear protection.
Choosing ear protection
Select ear protection based on the noise level and required NRR for optimal safety.
Acoustic, Heavy Metal, Rock & Roll
Music Specification
Compare how different music genres (Acoustic, Heavy Metal, Rock & Roll) affect noise reduction, helping you choose the right ear protection based on your environment.
Tri HT
Triathlete Specification
For users needing moderate attenuation, this chart shows the Tri HT’s performance across frequencies, ideal for environments with consistent noise.
EDIT
EDIT Specification
EDIT
More About Earplugs with
Attenuation Filters
Music Specifications
Heavy Metal
If you’re exposed to loud, heavy music, this chart helps you evaluate the best ear protection for blocking high-frequency sounds typical in heavy metal environments.
Music Specifications
Acoustic
For quieter or more acoustic settings, this chart shows how ear protection performs at reducing lower frequencies while maintaining clarity.
Music Specifications
Rock & Roll
Useful for individuals in rock music environments, this chart indicates how well ear protection blocks sound across mid and high frequencies common in rock music.
Medical & Health
Considerations
Discontinue use immediately if itching, irritation, or discomfort occurs.
Fen X Custom earplugs are not designed for children under 12 as the AI model was trained on fully developed ear canals.
Do not use earplugs if experiencing ear pain, infections, discharge, or after ear surgery unless cleared by a healthcare professional.
Product Lifetime
& Replacement
Over time, the ear canal may change shape, affecting the fit and performance of custom earplugs.
It is recommended to replace custom earplugs every 3–5 years or sooner if the fit becomes ineffective or damaged.
Limitations of Use
Results may differ in real-world conditions. For occupational use, always follow OSHA or local safety standards.
Noise Reduction Ratings (NRR) are laboratory estimates and may vary based on fit, insertion depth, and user anatomy.
Custom earplugs are not designed to protect against sudden blasts (e.g., explosions or gunfire) unless specifically rated for such use.
Legal Disclaimer
Custom earplugs are personal protective equipment intended for general noise reduction. They are not medical devices, do not guarantee complete hearing protection, and should be used as part of an overall hearing conservation strategy.
The manufacturer assumes no liability for injury or hearing damage resulting from misuse, improper fit, or alteration of the product.
For workplaces, employees must comply with all applicable OSHA, ANSI, or EN 352 hearing protection standards.
For Silicone Products
CA Prop 65 Notice
This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit P65Warnings.ca.gov.
Libaility Disclaimers
Custom earplugs are intended as noise reduction devices, not for total hearing isolation or use as medical devices; manufacturers disclaim liability for injury, hearing loss, or property damage resulting from misuse, improper insertion, or over-reliance on device performance.
Users are advised that product performance can vary based on personal ear anatomy, fit, and use; responsibility for proper use and maintenance lies with the end-user
Improper Use Warnings
- Do not force earplugs deeply into the ear canal, as this can cause pain, irritation, or injury.
- Never attempt to modify, cut, or alter the shape of custom earplugs, as this may reduce effectiveness and increase the risk of damage.
- Avoid sharing earplugs, even if cleaned, to prevent transmission of bacteria and risk of ear infection.
- Do not use earplugs in situations where the inability to hear environmental sounds, such as alarms or approaching vehicles, may present a safety risk.
- Ensure hands are clean before handling or inserting earplugs to minimize contamination.
Warning Signs
of Ear Damage
- Persistent ear pain or discomfort after using earplugs.
- Drainage or unusual discharge from the ear canal.
- Noticeable hearing loss, ringing in the ear (tinnitus), or a feeling of fullness or blockage that doesn’t resolve after removal.
- Redness, swelling, itching, or visible sores in or around the ear.
Recommended Precautions
- Discontinue use immediately if any signs of ear injury or infection occur and consult a healthcare professional.
- Seek prompt medical advice if hearing loss, pain, or discharge persists.
- Regularly inspect both earplugs and ears for signs of irritation or defective fit.
Emergency Steps for
Sudden Hearing Loss
- Stop using earplugs and avoid loud environments.
- Seek medical attention immediately—go to an emergency room or contact an ear, nose, and throat (ENT) specialist for an urgent appointment; do not wait for symptoms to improve.
- Do not insert objects or try to clear the ear canal.
- Note any accompanying symptoms—such as dizziness, ringing in the ears, or ear fullness—and share these with medical staff.
- Protect your unaffected ear from loud noises until evaluated by a professional.
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Sudden hearing loss is a medical emergency; immediate professional assessment offers the best chance for recovery.