Questions? Check the answers here.


How to wear Zenlx earplugs?

Step 1: insert and gently twist the ear plugs until they completely seal the ear canals. The ear plugs should feel comfortable and secure in your ears;

Step 2: remove the ear tips if they don’t fit;

Step 3: choose a different ear tip size/type;

Step 4: install the new ear tips onto earplugs.

How to find the best fit?

Experiment with different sizes until you find the perfect fit. If they're uncomfortable, go down a size; if you don’t feel secure, go up a size. Remember to follow the wearing instructions for proper positioning. Improper fitting can lead to underperformance of the product.

How to clean the earplugs?

Simply wipe them clean with a moistened cloth. Avoid using alcohol-based wipes or any harsh cleaning agents. Our earplugs can also be rinsed with water (yes, you don’t have to remove the acoustic filters). Ensure that they are thoroughly dried prior to use.

How to replace the acoustic filters?

To replace the filters, carefully remove the original acoustic filters and insert the new ones, ensuring they are in the correct orientation (front side has a larger circular opening).

How long does the earplugs last?

Our earplugs should last for over a year with regular use. However, the lifespan of your earplugs may vary depending on how often you use them, how well you care for them, and the environment in which you use them. If you find that your earplugs are not working as well as they used to, or if they are damaged, it is time to replace them.

How do I contact Zenlx customer support?

You can reach out to our customer support through hello@zenlx.net, WhatsApp, or message box on our website. For more details, please visit:

Contact Us


When do I choose Flow?

Flow provides noise reduction for 21dB, and is perfect for young, vibrant individuals who love to attend concerts, social gatherings, and indulge in outdoor activities. With its advanced hearing protection technology, it blocks harmful noises and improves sound quality to elevate your experience. For more details, please visit:


When do I choose Calm?

Calm provides noise reduction for 28dB, and is designed for individuals who require noise reduction for work, study, or sleep. It also comes with foam ear tips option which provides extra 2dB noise reduction. Its primary function is to block noises indoors, enabling you to concentrate or rest without distractions. For more details, please visit:


When to replace the acoustic filters for Flow?

We offer a lower decibel (-18 dB) filters option that allows for higher fidelity in sound. The filter set comes in a different color than the default option, providing you with a stylish alternative. Note that If the lower dB setting still does not produce your desired sound quality, you can simply remove the acoustic filters to get the best sound quality. Both lower dB and no filters settings reduce unwanted sharp noises.

When to replace the acoustic filters for Calm?

We offer a lower decibel (-25dB) filters option to those who wish to hear some sounds, but would still like to reduce noises. The filter set comes in a different color to provide you with a stylish alternative.

How does Flow help protect your hearing?

If you are attending a rock concert, the noise level can be as high as 110dB. This is a dangerous level of noise exposure, and can cause hearing damage after just one minute. Flow can help reduce the noise level to as low as 89dB, which extends your safe noise exposure period to over 2 hours.

How does Calm help you focus or rest?

Calm can provide up to 30 dB of noise reduction, which can help you muffle noises from people whispering, office or home appliances, distant city traffic outside your home etc.. This can help you focus, relax, or sleep more soundly.

What are the differences between Flow and Clam other than noise reduction level?

The sound quality is also different. The higher the noise reduction level, the lower the sound quality. This is because high-frequency sounds are more easily attenuated, or reduced in volume, than low-frequency sounds. When noise reduction is set to a high level, it removes more noise, but it also removes more of the high-frequency sounds. This can result in a loss of clarity and detail in the audio.Flow provides 10/18/21dB of noise reduction, which is a good level of hearing protection without sacrificing sound quality. Calm, on the other hand, provide 25/28/30dB of noise reduction, which is too high for concerts, but decent for focus or rest.In addition, Flow and Calm come in different colors, and are designed for outdoor and indoor use, respectively.Therefore, we do not recommend wearing Calm for concerts, nor wearing Flow for focus or rest.

Return & Warranty

What is the warranty policy?

We offer a comprehensive warranty for all of our products which include one-year losing pair warranty and two-year manufacturer warranty. For more details, please visit:


What is the return policy?

In addition to our 30-day free return policy, we also have a Green Returns program that helps us reduce our carbon footprint by minimizing packaging and shipping waste. If our earplugs are not the right fit for you, we encourge you to register your case for green returns and we'll assess your eligibility. For more details, please visit:

Green Returns

Knowledge Center

What is decibel (dB) level?

A decibel (dB) is a unit of measurement used to express the relative loudness of a sound. It is a logarithmic scale, which means that a 10dB increase represents a tenfold increase in loudness. For example, a 60dB sound is 10 times louder than a 50dB sound. Here are some examples of dB levels and their potential effects on hearing:

20dB - Ticking watch

30dB - Soft whisper

40dB - Refrigerator hum

60dB - Normal conversation

70dB - Vacuum cleaner

80-85dB - City traffic

95dB - Motorcycle

110dB - Rock concert

140dB - Jet takeoff

Learn more: NOISH

What is safe noise exposure level?

The National Institute for Occupational Safety and Health (NIOSH) established a recommended exposure limit (REL) of 85 A-weighted decibels (dBA) averaged over an eight-hour workday. Workers who are exposed to noise at or above the NIOSH REL are at risk of developing significant hearing loss over their working lifetime. Here are some examples of dB levels and RELs:

91dB - 2 hours

94dB - 1 hour

97dB - 30 minutes

100dB - 15 minutes

105dB - 4 minutes 43 seconds

112dB - 56 seconds

115dB - 28 seconds

120dB - 9 seconds

Learn more: NOISH