Everyone is unique (or so our moms told us), and so are our ear canals. Some ear canals bend to the back, some bend right, some are cavernous, some are narrow, some taper, and some flatten. You get the idea. Even with the same person, the left and right canals can be different.

Eargo’s Invisible Hearing Aids That Put the Flex in Flexi Fibers

Insanely Comfortable

Designing a device adaptable to every type of ear canal was an exciting challenge the Eargo engineering team set out to tackle when developing our patented Flexi Fibers. Made from medical-grade silicone, each Flexi Fiber was designed to allow movement through each conversation, chomp or yawn (just hopefully not at this blog post). We started by focusing on whether each individual fiber was flexible enough to provide the right amount of force to hold the hearing aid in place while still being gentle enough to rest comfortably in the ear.

Comfortable Eargo Flexi Fiber

To create the most comfortable fit for ears around the globe, each fiber was poked and prodded and the exact length, taper, and shape was hacked and honed by our engineering team. Each Flexi Fiber does its part to independently conform to the exact bends and contours of the ear canal. As a whole, they combine to create an incredibly adaptive, comfortable fit.

The arrangement of the Flexi Fibers was designed to be breathable, allowing air to flow in and out of the ear. This helps the ear to breathe and control its heat and moisture levels – no sweat-wicking fabric required.

Strong to the Core

Flexi Fibers are also designed to be strong and resilient. They can stretch to over 200% their length and flex tens of thousands of times without missing a beat, no sweat. Looks like someone’s been hitting their local yoga studio. They can hop from freezing to boiling temperatures (not that you’d want to expose your ears or your Eargo hearing aids to those temperatures). Bonus: They’re also biocompatible, hypoallergenic and easy to clean. We bow to the power of our Flexi Fibers.

Air Control

Ground control to Flexi Fibers, you’ve really made the grade… take your protein pills – well, how do you think Flexi Fibers got to be strong enough to go from a sauna to a snowstorm without a complaint? Our patented product was designed with open spaces and air paths to allow for air to move freely through the device, helping to regulate temperature and moisture in the ear.

Eargo snow

The Flexi Fiber’s open, spiral pattern and large air spaces allow for mid- and low-frequencies to pass naturally through the ear to the eardrum. They also allow for greater acoustic impedance, or the ability to block higher-frequency sounds (this reminds us – it’s time to work on our “selective hearing” Sound Profile). The openness of the Flexi Fiber allows Eargo to deliver strong amplification in the frequencies needed most and yet still sound and feel natural.


Let’s get technical: The angle, or asymmetric insertion-removal force, of the Flexi Fibers, helps Eargo to stay put throughout those busy days when you’re working for the weekend. The Flexi Fibers act as a team (there’s no “i” in ear), so even if any one arm of the arms loses its suction-like grip, the other tentacles, er, fibers, will suction to help keep the device in the ear. Because there are so many arms on the device each fiber only needs to provide the smallest amount of force so that it remains gentle enough to provide the comfort you’ve come to know and love.

As agile as crawling flexi fiber

Flexi Fibers help your ears feel as though they’re floating on clouds (say hi to Major Tom for us). Request your non-working sample from get.eargo.com/blog to learn how the patented product, made from medical-grade silicone, helps our hearing aids rest comfortably in the ear.


Daniel is a Founder and the Chief Clinical & Science Officer of Eargo. Brilliant, logical, curious, he’s our Mr. Spock, but way more fun at parties.


  1. Faye Rhodes Reply

    Looks interesting. I think I would enjoy wearing these hearing aids. I have a high frequency from being in the military. Ever year my hearing gets a little more bothersome, so I will check them out and then make a selection. Thank You.

    • Thank you for your interest in our modern hearing aids, Faye. Eargo was designed for adults with mild to moderate, high-frequency hearing loss and may not be appropriate for those experiencing more severe to profound loss. You can take our hearing screener at try.eargo.com, or call our team of personal hearing guides with any questions at 1-800-734-7603. Ch(ears)! ?

    • Remember veterans get a discount. I have severe high pitch loss and have Eargo hearing aids and hearing aids I bought through an audiologist. Nothing is perfect but I prefer the Eargos. Couldn’t hear songbirds and now I can.

      • Thank you for your service. Please call our personal hearing guides at 1-800-734-7603 to learn how we give back to those who gave so much for our country. Ch(ears)!

  2. Lou Body IV Reply

    I signed up for a non-working model about 3-4 weeks ago. It has never come. Why not?

    • When a new-to-Eargo client requests a sample kit from try.eargo.com, one of our personal hearing guides will call or email the client with the information provided on the request form. Our personal hearing guides want to get a sense of each client’s level of hearing loss to determine whether Eargo is right for their level of hearing loss, as our hearing aids were designed for those with mild to moderate, high frequency hearing loss. I’ll send a note to your personal hearing guide to reach out, and dial us directly at 1-800-734-7603.


    What is the difference bitween your system and the convencional ear hearing?
    If I sent to you from my country my audiometry are you able to deliver?

    • We do not currently have stores or ship outside of the United States. We will send either a sample kit or a set of hearing aids to a person’s US address contact and allow them to make personal arrangements for the overseas shipping. Please call our team of personal hearing guides with any questions, we’re all ears to discuss this and other details about our product and process at 1-800-734-7603.

  4. Dan Rexroad Reply

    I’ve been hearing impaired for almost 15 years and have had very expensive, hi tech hearing aids that failed to meet the test. When I found Eargo, I was skeptical. Being mostly attributable to having my pocket picket for around 7 to 8 grand. Now into my 5th month, all I can add is wow. Day one I could hear sounds I had not been able to hear for a long while. Working on Shuttle program had dimmed my high end hearing to a point, a bird chirp at 3 feet could not be heard. l hear now and am still learning what sounds are and how to pick a single voice from many. But I feel vindicated, about complaining about my old hearing aids. I suggest it may be the best move in your life. It has been one for me.

    • We’re happy to hear Eargo is helping you hear more of life! Thank you for sharing your excellent Eargo experience. Our team of personal hearing guides are hear for you to answer any questions or provide support (technical or otherwise). We’re all ears at 1-800-734-7603. Ch(ears)! ?

  5. I tried Eargo a year ago and found they really helped, but would not stay in my ears. My canals were too narrow for t

    • Thank you for trying Eargo, Roxane. We hope you find a hearing solution that meets your needs.

      • That is a very worrisome issue for me too. My ear canal is narrow. I always need the smallest earpieces in earphones. Are the Eargos bigger than that?

        • While every human being is unique …it turns out the size of our ear canals is not. So Eargo’s patented, soft-as-silk (well, medical-grade silicone) Flexi Fibers and Palms come in two sizes: Regular and Large. Our Regular size is going to be the right fit for about 90% of ears out there. Have questions? We’re all ears at 1-800-734-7603.

  6. michael oshea Reply

    are these workable with profound hearing loss, without my present aid i can hear nothing, my left ear is void of sound, my right ear drum has a hole in itpresently my miracle ear allows volumne but not clearity so i say h

    • Eargo is a modern hearing aid, designed for adults experiencing mild to moderate, high-frequency hearing loss. Our device may not be appropriate for those experiencing more severe to profound loss. You can take our hearing screener at try.eargo.com, or call our team of personal hearing guides with any questions at 1-800-734-7603. Ch(ears)! ?

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