The best option for breathing in oxygen is to wear a mask.

And there are some good reasons for that, including that masks make the mask wearer safer, according to an Australian research group.

“Oxygen masks are effective at keeping the airway clear,” said Dr Rebecca Tompkins, an environmental health researcher at the University of Western Australia’s School of Population, Health and Environmental Studies.

“[But] there are limitations to the mask that make it a poor choice for many people.”

The research team used a device called the Oxygen Sensor (OS) that was attached to a person’s face and monitors the level of oxygen in the air.

They found oxygen levels in masks fell significantly when people were exposed to a variety of air pollution.

When the oxygen sensor was connected to the wearer’s face, they found masks kept the airways clear by increasing the amount of oxygen the wearer breathed.

It is a key step in protecting against oxygen-induced respiratory illnesses, such as pneumonia.

The researchers say the device can detect whether the wearer is breathing in or out of the mask.

“The device measures the oxygen content in the mask to help people understand if they are breathing in the right air or in the wrong air,” Dr Tompkin said.

She said it would be difficult to detect oxygen in masks if people wore them for prolonged periods of time.

Other studies have found oxygen masks are safer.

In a study in 2014, researchers at the Federal Government’s Commonwealth Scientific and Industrial Research Organisation found masks made of polyester had been shown to protect against respiratory infections and pneumonia.

They also found the masks worked better for those wearing the mask when worn for long periods of the day.

However, Dr Tombkins said there was no evidence to suggest the masks were better for breathing than air filters.

Her group is working with other research groups to determine the best mask for people.

What are the benefits of wearing a mask?

Oxygenic masks are widely used for respiratory protection, but they do not keep out the harmful gases that are harmful to humans.

Some people, like the researchers, wear the masks to keep the air in the lungs clear and to help the wearer stay warm.

But many people do not wear the mask because they do it for other reasons, such a medical reason or because they are concerned about air quality.

Dr Tompys study was published in the journal Global Environmental Change.

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