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Woman using nasal cannula.

About us:
Melissa and David

Hi! I'm Melissa. Meet my husband, Dave.


What if you wanted to change the world but you had to do it dragging one lung behind you every single step of the way? Welp, that's me!

It's time nasal cannulas have a hygienic cover and oxygen users have comfortable oxygen cannulas! The O2 FRESH nasal cannula cover, that is.


Sorry for the shameless plug, but I can't help myself! I love the little cover I invented. In my hand it feels just right. It's the thing you didn't know you needed until you needed it. And then you REALLY need it.


I want to get it out into the world with all my heart and all the breath that is left in my body because I believe the way nasal cannulas are handled is healthcare's dirty little secret. And I believe this makes people sick. And trust me, I know what it is to be sick.


Our family goal is to make living with oxygen easier and invent even more great new products to help people!  Thank you for your support!

Award winning oxygen tubing protector

The O2 FRESH nasal cannula cover was awarded a Mobility Product Award in the Accessories, Wheelchair category in 2022 by Mobility Management. we are happy and excited that the O2 FRESH oxygen tube protector was recognized as being helpful for wheelchair users.

o2 fresh nasal cannula cover won award

O2 FRESH oxygen tubing covers recognized by the National Science Foundation

The Hartfiel Medical team was honored participate in the highly competitive National Science Foundation Innovation Corporation (NSF I-Corp) in 2020. Participation in the NSF program was instrumental in bringing our oxygen tubing protector for oxygen therapy to market.

Cannula holder funded by the Department of Defense

Fun fact: products designed with a 3D printer, like the original O2 FRESH nasal cannula cover prototype, aren't always manufacturable. That's because a 3D printer can produce shapes a manufacturing mold can't.

Hartfiel Medical was proud (and darn relieved) to receive a grant from the Department of Defense, administered by The Ohio State University, for the university to redesign our prototype cannula holder for manufacturing. A lot of craftmanship and deep thought went into the development and manufacture of the cannula cover.


Take a look, we're proud of our work!

O2 FRESH social values

Patient Advocacy​

O2 FRESH nasal cannula cover inventor Melissa Egts is a COPD Foundation State Captain involved in patient advocacy and promoting the use of the Foundation's patient and provider resources. Hartfiel Medical is proud to support the COPD Foundation as a Corporate Social Responsibility, Retail Support and Foundation partner.

Melissa is also happy to serve on the Fight For Air Climb planning committee of the American Lung Association (Cleveland). The Fight For Air Climb is the association's signature fundraising event.

Educating Next Gen Healthcare Workers


O2 FRESH nasal cannula cover inventor Melissa is a Biotechnology Advisor Board Member for the Akron STEM School.The focus of the high school is to help young adults find a career path in healthcare.

Our inspiration: We give thanks!


Jack Hartfiel, with his wife Sara, started a construction company to pay our Founder's medical bills when she became ill as a child. Jack worked on roofs during the day and a steel mill at night to make money to pay the bills and support their family of four daughters.

At its peak, the company they created provided jobs for 13 people - a true American success story.

COPD patient
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