Aegle N95 Mask - STS-F100 (Fold)


Number of Masks:

Utilizing a multi-layer filtration system, Aegle Particulate Filtering Respirators provide a minimum 95% filter efficiency against 0.3-micron airborne particles. Foldable Masks are designed for safety and comfort, made using ultra-lightweight materials that deliver exceptional fit and breathability.

Aegle was founded by a team of social impact investors in response to catastrophic shortages of PPE casued by the global COVID-19 pandemic.  They are committed to meeting the overwhelming domestic demand for PPE from the federal, state, public, and private sectors, and their first manufacturing plant is located in HUB/Opportunity Zone in Houston Texas.

Made in Texas
NIOSH Certification: TC-84A-9353
20 masks per bag
Cone Shape / Headstrap

Material Composition 

  • Outer Layer: Polypropylene spunbond

  • Filter: Meltblown non-woven electrostatic-charged 3 layers

  • Inner Layer: Polypropylene spunbond

  • Nose Clip: Polyethylene coated double-wire

  • Earloops: Elastic spandex


    • Description: N95 Respirator 

    • NIOSH Certification: TC-84A-9353

    • Part Number: STS-F100

    • 50 N95 Respirators per box

    • Particle Filtration Efficiency: More than 95% at 0.3

  • Inhalation & Exhalation Resistance: Less than 343 Pa


Counterfeit Protection: Aegle Track and Trace

When it comes to PPE, it’s critical to trust that the masks, gloves, or gowns you have in hand are authentic and reliable. That’s why Aegle developed a proprietary Track & Trace Open Data Platform—to ensure the authenticity of our products and combat counterfeiting in today’s market. 

Authenticate your product, learn more about Aegle, and view your Certificate of Analysis by scanning your product’s NFC chip.


Armbrust Review




Return policy: We cannot accept returns of any open packages of N95 masks.

(Click here for all USA made N95 masks)


Customer Reviews

Based on 50 reviews
Louise Arthur
Angle N95

Ordered 20 of these masks in light of the wave of covid, influenza and RSV. Continue to use Armbrust surgical masks for daily errands, etc., but bought these for travel or when extra protection in crowds is advised. Well constructed, as I have come to expect with Armbrust, with nicely integrated straps and wired nosepiece, and of course, NIOSH approved.

Thank you for leaving your thoughtful review.

We are happy to provide quality N95s like this one, and are so pleased to hear you have found this model comfortable! Thank you for giving us the honor of protecting you with quality masks like this one.

Lisa Siegman
Good seal, but on the large side overall

I'm glad to have the option of an American made N95, as I prefer the head straps. The seal seemed good, as there was little to no fogging of my glasses, and the covered nose wire was a nice touch. However, they are on the long side for my face, and I had to put a knot in the lower elastic to shorten it for a secure fit.

Judith M Saint Hilaire
Great Masks!

I love the N95 masks sold by Armbrust. Two things about them are great: they are made in the USA and they are approved by the CDC. I always feel safe when wearing one.

Breathable, comfortable, re-packable

In January 2022, I got into the N95 game with a pack each of these, IFMs, and Protex from Armbrust (love the fast and free shipping!). I tend to reuse N95s for at least a half dozen store/doctor outings, so the packability of the mask and longevity of the elastic are things I pay attention to (after fit and breathability). I switched back and forth pretty often between these and the IFMs until I realized that the elastic on these is WAY better and lasts much longer. I also find these more breathable than 3M Auras, and MUCH easier to fold up and unfold to use again. Because I was having some doubts as to the protectiveness of such a breathable and comfortable mask, and because it seemed like there might be a bit of an air gap around my nose, I actually bought a qualitative fit-test kit from an industrial hardware store and did a Bittrex fit test, and this mask performed great. I couldn't smell anything. (Side note, a trendy new elastomeric that claims to be very protective failed my DIY fit test instantly and spectacularly, so I knew the test was working). I stopped worrying and started trusting, and now I go into stores, doctors offices, and even on flights with a lot more confidence. Also I like the distinctive yellow straps. I will say it does help that I have long hair that I can put up, to hold the top strap up, but I think that would be the case with any N95.

Elizabeth Castillo

I love the Aegle N95 because it forms perfectly to my face and is the most comfortable mask


We apparently ordered the wrong masks. We wanted ones with ear fasteners, not full headband masks. Didn't know it until we opened the package. Non-returnable. Yuck!

Edward Fox

Appear to be exactly what I wanted

pamela hulsey
awesome masks

great company and fast shipping

Defective, no response from customer service

The masks split at the seam. The whole bag of 50 is defective and cannot be used. Customer service does not respond, so I am out $60.

Thank you for your thoughtful and honest review. We will make this right!

While we strive to make a perfect mask every time, we do acknowledge sometimes a customer will receive an item that does not live up to our high standards. I have reached out to your private email to further resolve this matter.

Look forward to hearing back!


R. B.
Mask Meets My Needs

Good fit. Eyeglasses no longer fog up when wearing this mask
Double straps do not interfere with my hearing aids.
Easy to lower the mask when eating.

Reasonable cost.

Non yet