Aegle N95 Mask - STS-F100 (Fold)


Number of Masks:
Free shipping on orders over $60

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 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 53 reviews
Reviewer avatar
Ann B
Best Overall Value

All of the N95 masks I tried ended up turning the bridge of my nose red and it was painful. So I purchased the Armbrust variety pack and wore each for one day. Taking price, protection, comfort, and my sensitive skin into consideration, the Aegle masks were my favorite. Combined with eyeglasses and a face shield, I'm ready to enjoy a football game in a crowded stadium filled with cheering fans. You can't go wrong with an Armbrust mask, but these Aegle masks are a really good deal. And they're Made in the USA.

Glad to hear these Aegle N95s fit so well!

Vivien Z.
Best Mask Out There!

I have had a subscription since 2021. I tried several different brands of N95s prior to finding the Aegle N95. They're comfortable, easy to breathe in, and have a nosepiece that facilitates a great seal. I also love that I can get them with headbands because I hate ear loops. Additionally, the customer service at Armbrust is first rate, and I appreciate and enjoy the educational videos that Lloyd posts that explore different types of masks with their plusses and minuses. This is a company you can trust.

Hi Vivien! Thanks so much for your feedback and more than kind words - we truly appreciate them and your continued support with help bringing strategic manufacturing back to the USA!

Jan G
Best mask around!

I ordered the N95 from Armbrust based on a recommendation from my adult son who has researched the mask industry offerings extensively. He was so right about these masks. They are proven to be protective based on materials and construction. But they are also by far the most comfortable protective mask I’ve ever worn. It’s easier to breathe behind it, it is softer and not so stiff, and the top of the mask at the bridge of my nose fits with a good seal which means my sunglasses don’t fog up. Only wish my son had discovered these sooner!

We thank you and your son for your support and research!

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