Filtration like an N95
Breathability of a 3-Ply

Science-Based Personal Protection

Science-backed innovation

ULTRA FIT™ Protects both you and people near you

Read about the science behind the mask 

Watch the Video

How to wear an ULTRA FIT™ mask

Click HERE for the donning instructions video and HERE for extra fitting tips.

The ULTRA FIT ™ Mask History

Advanced, low-cost mask protection technology born from research performed by a group of 300+ scientists, physicians, engineers, and makers at some of the world’s top hospitals and research labs. Read about Katharos Labs history here.

Solid Science

The ULTRA FIT™ mask was developed by leading physicians, engineers and manufacturing experts to provide superior protection at a low cost. Click here to see testing data for the mask

ULTRA FIT™ Masks - Box of 25

Contact Katharos Labs for Details

Order Now

ULTRA FIT™ masks are now available!

Buy Now Contact Us

Universal Fit


Closely forms to anyone's face for a comfortable fit

Watch the Donning Instruction Video

Better Protection through Superior Fit

Less Fogging

Keep Glasses Clear

Superior sealing means far less annoying fogging

Custom Molding Gives a Feeling of Greater Security

Once molded to your face, the ULTRA FIT™ mask provides comfort, security and high breathability. Click the button below to see an instruction video on how to properly wear an ULTRA FIT™ mask.

Fits Everyone

Watch the Donning Instructions

What UltraFit™ users say...

I tried a lot of different masks after returning to work following my COVID recovery. The UltraFit was the most comfortable and closest fitting and almost completely eliminated the fogging of my glasses, a real issue with other masks.  No other mask made me feel as safe and secure"

Peter S.

Manager of Manufacturing, HMC

I really, really like this mask!

The moldable inserts allow it to seal better than any other mask. I feel safer, more secure, and my glasses don’t fog as much as other masks"

Chip Johns

CEO, Edson International

After using KN 95 masks for months, I found the mask surprisingly light and comfortable. The mask was easily fit to my face, did not fog my glasses, and was comfortable for long periods, particularly around my ears”

Scot Jones

CEO Groov-Pin Corp.

I just received my UltraFit masks and decided to try them out at the gym. Once I optimized the fit, I found the mask is more breathable and has less eyeglass fogging than my conventional KN-95s, which is super helpful when working out.
Also, I had no problems with it sliding off my chin, which sometimes happens with the KN-95. Well done!”

Mark S.

CEO Replex Plastics