The ReadiMask Dental Hack: Nose-Only N95 Protection at the Dentist

A favorite hack among the covid cautious crowd

Source: PlusLife Substack

The dentist’s office is one of the most exposure-intense environments a Covid-cautious person regularly navigates. You’re reclined, mouth open, inches from a provider’s face, in a room that may have seen a dozen other open-mouthed patients that day. Aerosols generated during drilling, cleaning, and suction procedures can remain airborne for extended periods — and by definition, you cannot wear a mask over your mouth during treatment.

For years, this felt like an unavoidable dead end. Either you skip dental care (not a good option) or you accept a period of fully unprotected, high-aerosol-exposure time in the chair. Then a nurse practitioner named Lisa Foreman shared a simple, ingenious workaround on social media that changed the calculus for thousands of Covid-cautious people: the nose-only ReadiMask hack.

“You can’t mask your mouth at the dentist. But you can absolutely mask your nose — and nasal inhalation is where most of your Covid exposure risk lives.”

The Problem: Why the Dentist Is High-Risk

SARS-CoV-2 and other respiratory viruses spread primarily through airborne aerosols — tiny particles that remain suspended in indoor air, sometimes for hours. Dental procedures are among the highest aerosol-generating activities in a clinical setting. Ultrasonic scaling, drilling, high-speed handpieces, and even simple suction all produce fine aerosol clouds that can carry infectious particles throughout the room.

At the same time, you’re stationary and reclined — not moving through the space quickly — and your face is close to the provider’s breathing zone. The standard advice of “just take off your mask while the dentist works” leaves an exposure window of anywhere from 30 minutes to over an hour for a typical cleaning or procedure.

Why the Nose Matters Most

Research on respiratory virus inhalation consistently shows that nasal breathing represents the primary route of aerosol uptake into the lower respiratory tract. The nose is also the most efficient entry point for viral particles due to its surface area, moisture, and the direct pathway to the olfactory region and airways.

While you exhale and receive dental treatment through your mouth, the bulk of dangerous inhalation exposure during the procedure occurs through your nose. Filtering that pathway provides meaningful, real-world risk reduction — even when your mouth remains uncovered.

The Hack: What It Is and Where It Came From

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The nose-only ReadiMask hack was developed and shared by Lisa Foreman, an APRN (Advanced Practice Registered Nurse), who posted the technique on social media in April 2022. The concept is simple: rather than applying the ReadiMask in its intended full-face configuration, you fold and apply it exclusively over the nose — leaving the mouth entirely free and accessible for dental work, while maintaining N95-grade filtration at the nose.

The hack quickly spread through the Covid-cautious community. Shortly after Foreman’s post, Gerard Hughes — an engineer and mask advocate — independently fit-tested the nose-only application using a professional PortaCount device (the same equipment used in OSHA-certified respirator fit testing programs). His result: it passed. The nose-only ReadiMask configuration achieved a fit factor that met OSHA’s quantitative fit test threshold for N95 respirators.

The technique has since been documented by the World Health Network’s dental safety guidelines, the Clean Air Crew, and multiple Covid-cautious community resources — and has helped tens of thousands of people maintain protective measures during dental care.

Step-by-Step: How to Do The ReadiMask Hack

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Step 1: Prepare Your ReadiMask — Before You Leave Home

Take a full ReadiMask N95 out of its packaging but do not apply it yet. The optimal time to prepare is at home before your appointment, where you have a clean, well-lit environment and enough time to do it right. Do not try to prep it in the car or waiting room.

Tip: Bring a spare ReadiMask in case you make an error during preparation.

Step 2: Fold the Lower Half of the Mask Upward

Hold the mask face-up. Fold the bottom half (the portion that would normally cover your mouth and chin) upward, toward the nose section. You are reducing the mask’s coverage area to just the upper portion — the part designed to cover the nose bridge and the area just above the upper lip. Crease the fold firmly so it holds.

Tip: Some people use a small piece of medical tape to secure the fold before applying. This is optional but helps keep it tidy.

Step 3: Trim the Lower Edge (Optional but Recommended)

For a cleaner application, some users prefer to lightly trim the folded lower edge with scissors to create a straight, even border just above where the upper lip meets the nose. This is optional — the fold alone works fine — but trimming prevents any loose adhesive edge from catching or peeling during treatment.

Tip: If you trim, cut along the fold line. Do not cut into the filter layer above the fold. Medical scissors give the cleanest line.

Step 4: Apply to the Nose Only — With a Clean, Dry Face

Peel the adhesive backing and position the mask over your nose. The adhesive perimeter should seal around the nose bridge, along both sides of the nose, and just above the upper lip — but it should not cover the lips or mouth at all. Press firmly around the entire sealed edge to ensure full contact with the skin. Hold for 10–15 seconds.

Tip: Apply to clean, dry, product-free skin. Moisturizers, sunscreens, and makeup all degrade the adhesive seal. Apply before putting on any makeup if possible.

Step 5: Confirm Your Mouth Is Fully Accessible

Open your mouth fully and check that the dentist will have unobstructed access. The mask should sit completely above the upper lip. You should be able to open wide, move your jaw, and speak clearly without any part of the mask interfering. If the lower edge is touching or near your lips, re-position or trim before applying.

Tip: Do a test open in front of a mirror before leaving home. Dental tools need clear access — don’t leave this to discover in the chair.

Step 6: In the Chair — Breathe Through Your Nose

During the appointment, consciously breathe through your nose as much as possible. Your nasal inhalations are being filtered at N95 efficiency. Exhale normally through your mouth or nose — both are fine. You do not need to hold your breath or do anything unusual. The mask stays in place throughout the procedure.

Tip: Remind yourself periodically: inhale through nose. This becomes natural quickly. Most patients forget the mask is there within the first few minutes.

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Does It Actually Work? The Evidence

The most important data point is the PortaCount fit test. PortaCount is the industry-standard quantitative respirator fit testing device used by OSHA-compliant programs, hospitals, and industrial safety programs. OSHA requires a fit factor of 100 or higher for N95 respirators to pass.

Gerard Hughes’ independent fit test of the nose-only ReadiMask hack recorded a passing fit factor — meaning the configuration met OSHA’s quantitative standard for N95 filtration performance. This is not a theoretical claim or community anecdote. It is the same test that healthcare workers undergo to certify their respirator use.

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What the Fit Test Tells Us

A PortaCount measures the ratio of particles outside the mask to particles inside the breathing zone. A fit factor of 100 means the mask reduces particle concentration by 100x — the minimum for N95 certification. The nose-only ReadiMask hack passed this test, meaning that when applied correctly over the nose, it provides verified N95-grade filtration for nasal inhalation. This is what matters when you’re breathing in an aerosol-heavy dental environment.

It is also worth noting the physiology: approximately 70% of resting respiratory volume is inhaled through the nose. During a reclined dental procedure, where patients typically breathe more slowly and nasally, this proportion may be higher. Filtering nasal inhalation is not a partial measure — it is addressing the primary vector of aerosol exposure.

Other Protective Measures to Stack With the Hack

The nose-only ReadiMask is a meaningful layer of protection, but it works best as part of a broader strategy. The Covid-cautious community has developed a practical toolkit for safer dental visits:

• Book the first appointment of the day. Aerosol load in the operatory accumulates over the course of the day. The first slot after overnight air exchange is consistently lower-risk.
• Request a provider who will mask. Ask at booking whether any clinicians wear an N95 during procedures. Some will accommodate this request; many will not — but it’s worth asking.
• Bring a CO2 monitor. An Aranet4 or similar monitor tells you the ventilation quality of the space. Elevated CO2 (above ~800 ppm) indicates poor air exchange and higher aerosol risk. This gives you useful real-time context.
• Use a full ReadiMask in the waiting room. Apply the hack only when you get to the chair. In the waiting room, wear a full, properly applied ReadiMask for complete protection.
• Ask about HEPA filtration in the operatory. Some practices have installed portable HEPA air purifiers. It’s worth asking — and noting for future appointment decisions.
• Minimize small talk between procedures. When the dentist steps away to get materials, that’s not the time to chat unmasked. Have the ReadiMask ready if you need a break from the chair.
• See if the dentist will take a PlusLife test. While this is a bit long-shot, one simple nasal swab + 35 minutes time to run the test, will give you enormous confidence in whether they are actively infectious. While they aren’t cheap, they are a CC game changer.

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• Test your skin compatibility beforehand. Try the adhesive on a small patch of skin before your appointment day. Some people with sensitive skin benefit from a thin layer of barrier film under the adhesive edges.

Important Limitation

The nose-only ReadiMask does not protect your mouth or eyes. It is not a complete replacement for a full N95 — it is the best available option when a full mask is incompatible with the procedure. Think of it as meaningful partial protection rather than full protection. Every layer still matters.

Where to Get ReadiMask

ReadiMask isn’t always easy to find in standard retail channels, and pricing can vary significantly.

You can always purchase them directly from the manufacturer:

[embed]ReadiMask ReadiMask is the only strapless N95 respirator with a perfect seal to keep you and yours safe. MRI Safe.readimask.com

But they tend to sell the masks at a high price point unless you are purchasing large quantities, or join their subscription order service.

So where do you go if you just need a few for an upcoming MRI?

One source for vetted Covid-cautious supplies — including ReadiMask — is the **Plus Life Tests newsletter at [pluslifetests.substack.com](https://pluslifetests.substack.com)**.

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The newsletter curates tools, tests, and protective gear specifically for people taking Covid-caution seriously. Subscribers get access to sourcing guidance, community deals, air quality resources, and regular updates on the best protective tools available — all vetted by people who take this seriously.

Final Thoughts

The nose-only ReadiMask dental hack is one of the most practical, community-developed solutions to emerge from the Covid-cautious community. It addresses a real gap — a situation where standard masking is structurally impossible — with a clever adaptation of existing technology that has been independently verified to work.

It won’t eliminate all exposure risk at the dentist. Nothing will, short of a hermetically sealed environment with a full-face respirator, which is not compatible with having your teeth cleaned. But it meaningfully reduces your primary inhalation exposure during a high-risk procedure — and for people managing immunocompromise, long Covid, or chronic conditions, that reduction is not a minor thing.

Practice the application at home first. Bring a spare. Book the first morning slot. And stop putting off the dental care you need. This hack gives you a real, evidence-based option for doing it more safely.