Full Face Snorkel Masks: What the Safety Data Says Before You Buy One

These masks are genuinely more comfortable and there is a body of drowning research pointing at them. Both things are true, and a buying guide that ignores the second is not worth reading.

By Josh WhitakerPublished Checked 6 min read
A snorkeller wearing a mask and snorkel at the surface of clear water
Comfort is the case for a full face mask. Removal speed is the case against one.Nadya Peek / CC BY 2.0
What we checked ourselvesAmong near-drowning survivors surveyed for Hawaii's Snorkel Safety Study, 38 percent were using a full-face mask, and 90 percent of those considered it a contributing factor to their trouble. The study also found aspiration of water was rarely the trigger for a snorkelling emergency.

Affiliate disclosure. This guide contains affiliate links, including Amazon Associates links. If you buy through one, Smart Travel Info may earn a commission at no additional cost to you. Selection is based on published standards compliance, airflow design and sizing. Commission rates play no part in the ranking. See our editorial policy.

Two things are true about full face snorkel masks, and a buying guide that mentions only the first is not worth your time.

They are genuinely more comfortable. You breathe through your nose and mouth normally, there is no mouthpiece to bite, and the field of view is wider. For people who cannot tolerate a mouthpiece, this design is the difference between snorkelling and not.

And Hawaii's Snorkel Safety Study found that among the near-drowning survivors it surveyed, 38 percent were using a full face mask, and 90 percent of those considered it a contributing factor to their trouble.

That is not proof of causation and the study does not claim it is. It is enough to buy deliberately rather than by default.

What the concerns actually are

Four specific structural problems, rather than a general unease.

Three snorkel mask designs shown side by side, enclosing different amounts of the face
How much of the face a mask encloses is the variable that decides how fast you can get it off. Helmardine / CC BY-SA 4.0

You cannot spit out a mouthpiece. With a conventional snorkel, one movement gets your face to open air. A sealed mask has to come off your head.

You cannot clear the tube with a sharp exhalation. The standard clearing technique does not transfer to this design.

You cannot remove it quickly. Even with a quick-release strap, getting a sealed mask off a panicking face in water takes meaningfully longer.

A valve malfunction is more serious, because your entire airway runs through the mask.

Underneath all of that sits the study's central finding: inhaled water is rarely the trigger in snorkelling emergencies. The mechanism is usually SI-ROPE, fluid accumulating in the lungs, and the study names the snorkel's resistance to inhalation as its first risk factor. A mask with poor airflow design adds resistance to a mechanism that is already the problem.

Do not use one if

You have a beard or heavy stubble, which prevents a chin seal. You intend to duck-dive, which this design is not built for. You have a known cardiovascular or respiratory condition. Or you are not a confident swimmer. In each of those cases a conventional mask and snorkel is both safer and more capable.

What to look for when buying

Separated airflow

The design feature that matters most. Fresh air should be routed down across the lens, keeping it clear of fog, and exhaled air routed out through a separate channel so it is not rebreathed.

Cheap unbranded masks frequently implement this poorly or not at all, which is where carbon dioxide accumulation comes from. This is not a marketing feature; it is the mechanism.

A named standard and a named manufacturer

Look for CE marking and a stated EN standard, from a company with a name, an address and a model number. The masks that perform worst in independent testing share a profile: no standard cited, no manufacturer identified, a generic name, and a listing full of superlatives.

Correct sizing

Sized by the distance from the bridge of your nose to the bottom of your chin. Manufacturers publish a chart; measure rather than guess. A mask that is too large will not seal at the chin and will leak continuously.

A dry-top valve

Prevents water entering the tube when a wave washes over it. Standard on decent masks, absent on the cheapest.

A genuine quick-release

Some masks use a strap system you can release with one hand. This is worth paying for given that removal speed is one of the central concerns.

Masks worth considering

These are selected on airflow design, published standards and sizing quality. Confirm the current specification and standards statement on the listing, since manufacturers revise these frequently.

WildHorn Outfitters Seaview 180

The reference design

The best-known full face mask from a company that names its standards and publishes its airflow design. Separated airflow, dry-top valve, and a size chart based on face measurement. It is the one to compare others against.

  • Airflow Separated intake and exhaust
  • Sizing By nose-bridge to chin measurement
  • Best for Adults wanting the best-supported version of this design
  • Watch for Wider faces need the larger size; a marginal fit leaks

Check current listings

Ocean Reef Aria series

Best-documented standards

An Italian diving equipment manufacturer rather than a snorkel-mask brand, which shows in the documentation. The Aria range publishes its CE and EN compliance clearly and offers multiple sizes and versions.

  • Airflow Separated, with published flow design
  • Standards CE marked with stated EN compliance
  • Best for Anyone who wants the documentation to exist
  • Watch for The most expensive option here

Check current listings

Greatever full face snorkel mask

Mid-market

A widely sold mid-priced option with separated airflow and a dry-top valve, in two sizes. Reasonable for occasional holiday use, and the sizing is the thing to get right.

  • Airflow Separated
  • Sizes Two, by face measurement
  • Best for A once-a-year holiday snorkel
  • Watch for Verify the current listing states its standards; specifications change between production runs

Check current listings

Youth-sized full face masks

Children, with caveats

Children need a mask actually built at child scale, because an adult mask on a small face will not seal and the air volume is proportionally larger. Buy a youth size or do not buy this design at all.

  • Sizing XS or youth, by measurement
  • Best for Confident swimming children in shallow, supervised water
  • Watch for The Snorkel Safety Study's advice applies doubly: stay where they can stand

Check current listings

The alternative: a conventional mask and dry snorkel

More capable, cheaper

Worth stating as a genuine option rather than a footnote. A tempered-glass mask with a wide-bore dry snorkel costs less, lets you duck-dive, clears with one exhalation, and can be dropped from your mouth in a second. Look for a wide, smooth bore, which is exactly what the safety study's equipment advice points at.

  • Best for Anyone who might want to dive down, anyone with a beard, strong swimmers
  • Look for Tempered glass, silicone skirt, wide-bore snorkel with a purge valve

Check current listings

Using one safely

Whichever you buy, the study's proposed safety messages apply:

  • Swim with a buddy. If you cannot swim, do not snorkel.
  • Stay where you can touch the bottom. Almost every incident surveyed happened where the person could not.
  • Practise removing the mask in shallow water before you need to.
  • Treat sudden breathlessness as an emergency. Stay calm, remove the mask, breathe slowly and deeply, stand up, get out of the water.
  • Consider waiting several days after arriving by air before snorkelling, which the study proposes as prudent.

Our guide to how a snorkel actually works covers the physics of dead space and inhalation resistance, and the full findings of the Snorkel Safety Study, including the warning-sign sequence that precedes most incidents. For the entry and exit, our water shoes and fins guide explains why full-foot fins and water shoes never work together.

What to do first

Decide honestly whether this is the right design for you. If you have a beard, want to dive down, or are not a strong swimmer, buy a conventional mask and a wide-bore snorkel instead, and you will have better equipment for less money.

If a full face mask is right for you, measure your face, buy from a manufacturer that publishes its standards, and practise taking it off in the shallows on the first day.

Frequently asked questions

Are full face snorkel masks safe?

The picture is concerning rather than settled. Among near-drowning survivors surveyed by Hawaii's Snorkel Safety Study, 38 percent were wearing one and 90 percent of those considered it a contributing factor. The structural issues are that you cannot spit out a mouthpiece, cannot clear the tube with a sharp exhalation, and cannot remove the mask quickly.

What is CO2 buildup in a full face mask?

Exhaled air containing carbon dioxide accumulating inside the mask instead of being flushed out. Designs with separated airflow route fresh air across the lens and exhaled air out through a separate channel to reduce it. Cheap unbranded masks frequently do this badly.

What standard should a full face snorkel mask meet?

Look for CE marking and a stated EN standard on the packaging, and a manufacturer that names it. A listing with no standard, no manufacturer address and no model number is the profile of the masks that perform worst in independent testing.

How do you size a full face snorkel mask?

By the distance from the bridge of your nose to the bottom of your chin, which manufacturers publish as a size chart. Beards and heavy stubble prevent a seal at the chin and are an outright reason not to use this design.

Can you dive down with a full face mask?

No. Breath-hold diving with a full face mask is specifically discouraged: the mask has a large air volume that squeezes as you descend and you cannot equalise or clear it the way you can a conventional mask and snorkel.

Who should not use a full face snorkel mask?

Anyone with a beard, anyone intending to duck-dive, anyone with a known cardiovascular or respiratory condition, and anyone who is not a confident swimmer. For those cases a conventional mask and snorkel is both safer and more capable.

Is a conventional mask and snorkel better?

For capability, yes, without much argument: you can dive, you can clear it, you can drop the mouthpiece in a second. Full face masks win only on comfort for surface swimming, particularly for people who cannot tolerate a mouthpiece.

Josh Whitaker

Outdoor and watersports editor

Josh covers watersports gear and public-land access. He reads the permit rules, the fee schedules and the safety standards so the numbers in a piece match the ones the managing agency publishes.

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