Safety, Use & Care

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.

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.

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.

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

This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit P65Warnings.ca.gov.

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

• 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.

• 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.

• 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.

1. Stop using earplugs and avoid loud environments.
2. 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.
3. Do not insert objects or try to clear the ear canal.
4. Note any accompanying symptoms—such as dizziness, ringing in the ears, or ear fullness—and share these with medical staff.
5. 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.