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For every respirator sold, we'll donate one to someone affected by the wildfires. 


Everyone Deserves Clean Air


Designed For Air Pollution

O2 Curve Respirator

The O2 Curve is a compact, personal elastomeric respirator designed to filter microscopic particles, from pollution to smoke and dust. The product was inspired when our 2 cofounders visited China in 2014 and experienced severe air pollution for the first time.
The medical grade silicone seal completely seals around your nose and mouth, forcing all air you breathe through the filters.  This makes the Curve a great solution for people looking to limit their exposure to smoke.

Choosing a Mask vs a Respirator

It's About The Air You Breathe

Respirators are designed to protect the person wearing them, by keeping a tight seal to the face and filtering all of the air the user is breathing in.  Masks are designed to protect other people.  Think of a dentist or nurse: they wear a mask so as not to further expose their patients to any potential droplets they could discharge.  As a result, respirators offer the wearer better protection from air pollution and smoke. For the best of both worlds, attach a surgical mask to the O2 Curve via our surgical mask adapter.

Program Details

Buy 1, Give 1 (on us)

We've been working with local community foundations to get respirators to those who need them most.  Sadly, the need is tremendous.   For the rest of September, we will donate a Curve respirator for every Curve purchase and get it in the hands of those directly affected by the wildfires.  We are hoping to donate 25,000 respirators.


Q: What Is The Difference Between a Respirator and a Mask?

A: Respirators protect the wearer from exposure to airborne particles, including biological aerosol droplets. Therefore, respirators require an airtight seal to the face. Surgical masks are designed to act as a barrier to biological fluids, and are primarily designed to protect patients from the droplets of health care workers. O2 Canada manufactures respirators, and currently we have no plans to manufacture masks, except for use in conjunction with our respirator products for health care workers.


Q: What type of filter does the O2 Curve use?

A: The O2 Curve uses a triboelectric charged filtration system, which consists of a hydrophobic outer shell that sandwiches a layer of melt blown filter medium, as well as a filter. This filter system works both mechanically and electrostatically, and particles that are too small to be filtered physically are attracted to the charged filter, for improved filter efficiency and performance. The O2 Curve filters material are designed and rated filter with greater than 99% efficiency down to a particle size of 0.1 microns, and independent lab testing confirmed exceptional filter efficiency even under high air flow conditions.


Q: How well does the O2 Curve compare in terms of fit testing?

A: The purpose of the mask fit test is to provide an individualized result for a specific wearer, and therefore not every respirator will fit every face. However the O2 Curve has consistently passed both qualitative and quantitative mask fit testing. Using the TSI PortaCount® 8038 QNFT protocol, the O2 Curve has repeatedly passed with a score of 200+ out of a highest possible score of 200.


Q: Which way do I insert the filter?

A: The O2 Curve filters come in a plastic envelope. The side of the filter facing the clear film of the envelope is upstream of the airflow, meaning the side that can be seen through the clear film is the side that should face out and away from the user’s face. 


Q: How often should I replace the O2 Curve’s filter?

A: How often you should replace your filter depends on usage and the environment it’s used in. For general use, such as pollution filtration, the filter should last one to two weeks. In highly polluted environments, you may need to switch the filter more often.


Q: How long can the filters be used for?

A: For air pollution applications, the O2 Curve filter was recommended to be changed after fourteen (14) days with typical use. We are currently researching how to best utilize the O2 Curve to protection against biological aerosols, but we recommend the filters be changed daily in conditions where exposure is high, or if the filter would otherwise become compromised. We are also currently studying extended filter use beyond these recommendations. When the wearer is intending to protect against infectious particles, it is prudent to dispose of the filter appropriately each time the O2 Curve is used, and to disinfect the respirator between uses.


Q: What is the return policy?

A: Due to the personal nature of the use of the O2 Curve and the current COVID-19 pandemic, at this time the product is non-returnable.  In the unlikely event of a damaged, defective or wrong item delivered to you, we will provide a full refund or free replacement as applicable. We may contact you to ascertain the damage or defect in the product prior to issuing a refund/replacement. Some exceptions may apply for sealed items only.

Media Coverage

See what the world is saying about O2 Canada

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"In fact, their premier product, O2 Curve, is the result of years of research..."

"...and development and has little in common with the cloth masks being manufactured as side projects by clothing companies today. O2 Canada has been designing masks for six years, helping people who live in polluted areas,"


"O2 Canada fits China with world’s finest pollution masks"

"The anti-pollution device was modelled on research from Polytechnic University that provided specifications for the average face shape in China."


"As far as respirators go, the compact design is pretty stylish."

"From particles and dust to bacteria and contaminants, the air is full of harmful pollutants. The O2 Curve Mask offers superior protection from these hazards without sacrificing comfort."