How to choose a diving mask
A mask has one job: seal against your face and let you see clearly. Everything else — lens layout, volume, frame — comes after that. Here’s how to get all of it right, in the order that matters.
Start with fit. Nothing else matters first.
No two faces are the same, and no mask fits everyone. A mask that seals beautifully on one diver leaks steadily on another with a narrower nose bridge or higher cheekbones. The good news: you can predict a leak in about 30 seconds, before you ever get in the water.
Does this mask fit your face?
- Hold the mask to your face with the strap off — not behind your head.
- Tilt your head down slightly and inhale gently through your nose.
- Let go of the mask and stop inhaling. Don’t hold your breath.
When you test, pay attention to the usual leak points: the sides of the nose pocket, the upper-lip area, and the inner corners where your nose meets your cheekbones. Facial hair on the upper lip and stubble along the seal line will let water in — that’s physics, not a faulty mask.
Mask types: which layout fits how you dive
The lens layout decides three things at once — your field of view, whether you can fit prescription lenses, and how the mask behaves at depth. There are four practical shapes.
Single-lens masks use one continuous pane with no frame down the middle, so the view is uninterrupted — a reason photographers and videographers tend to prefer them. Twin-lens masks split the view with a nose bridge but earn their keep by accepting prescription optical inserts, which makes them the obvious pick if you wear glasses and don’t use contacts. Multi-window masks add transparent side panels for more peripheral light and a more open feel; some also carry a purge valve for hands-free clearing. Low-volume goggles strip the air space to a minimum for freediving — but with no nose pocket they suit pool work and divers who’ve learned to equalise without one.
Volume: it matters more than you think — for some divers
Internal volume is the air space between the lens and your face. Every time you descend, that space compresses and you top it up by exhaling a little air through your nose. A lower-volume mask needs less air to equalise on the way down, and less air to clear if it floods.
For freediving and snorkelling, volume is a real advantage. You’re working with one breath, so air spent on the mask is air you don’t get back. For scuba, the difference is mostly marginal — your regulator gives you plenty of air for both equalising and clearing, so it’s smarter to choose on fit, comfort and field of view than on volume alone.
Field of view, skirt colour and prescription lenses
Prescription corrections
Twin-lens masks accept corrective optical inserts because each lens is framed separately. Single-lens and frameless masks generally can’t — for those, contact lenses under a standard mask are the simpler route.
Black vs clear silicone
A black skirt blocks side light and lifts contrast — handy for photography and bright water. A clear skirt lets peripheral light in and feels more open and less confining. Both seal equally well; it’s preference, not performance.
Wide view vs replaceable lenses
If an unbroken field of view is your priority, single-lens wins. If swapping in prescription optics or replacing a scratched lens matters more, twin-lens is the more practical long-term choice.
Skirt, frame and strap
All quality diving masks share two materials: a tempered glass lens, which shatters into blunt granules rather than sharp shards and stays clear under pressure, and a silicone skirt that does the sealing. After that, three things vary.
The part that actually seals
Soft silicone conforms to your face and should hold a seal with no strap tension at all — that’s exactly what the fit test checks. A skirt that needs a tight strap to seal is the wrong shape for you and will leak as the silicone fatigues.
Plastic, frameless or aluminium
Plastic frames suit most diving. Frameless masks fold flat — ideal as a packable backup. Aluminium-framed masks (such as the LUCIDA or the Metal) are more rigid and impact-resistant, and hold their seal better under the pressure of a thick neoprene hood.
Silicone or bungee
A silicone split strap lets you position the mask precisely. A bungee strap stretches over the head with no adjustment and is faster to don one-handed under stress — which is why it’s popular for backup masks. Look for buckles you can work single-handed, even with cold or gloved hands.
Stop the fog — and make the mask last
A brand-new mask will fog no matter what you do, because the lens carries a thin factory film from manufacturing. You have to remove it once, then keep the lens treated before every dive.
Now match a mask to how you dive
SoprasSub
Scuba and snorkelling — single, twin and multi-window masks for everyday recreational diving and travel.
Browse the range →SoprasTek
Low-volume frameless masks that pack flat as a backup, plus rugged framed and aluminium options.
Browse the range →SoprasApnea
Low-volume masks for easy equalising, minimal-volume goggles for the pool, and camo for spearfishing.
Browse the range →Frequently asked
Single-lens or twin-lens — which should I get?
If the widest possible unbroken view matters most, go single-lens. If you wear glasses and don’t use contacts, go twin-lens: its framed lenses can be swapped for prescription optical inserts. For most recreational divers it comes down to which one seals better on your face.
Why does my mask leak even when I tighten the strap?
Almost always one of three things: an over-tightened strap that distorts the skirt, hair or stubble caught under the seal, or a mask shape that doesn’t match your face. Re-run the fit test with the strap off — if it won’t seal on suction alone, tightening won’t help. Try a different skirt shape instead.
What does “low volume” actually do for me?
Less air between the lens and your face means less air to equalise on descent and less to clear if the mask floods. It’s a genuine advantage for freediving, where every breath counts. For scuba it’s marginal — choose on fit and view instead.
Can I use a scuba mask for freediving, or the other way round?
You can cross over either way. A low-volume freediving mask is actually easier to equalise on a scuba descent. Going the other way, a scuba mask works fine for freediving — a purpose-built low-volume model just costs you less air at depth. For pure pool apnea, a minimal-volume goggle goes further still.
How long does a diving mask last, and when should I replace it?
A well-kept mask lasts years. Replace it when it leaks despite a correct strap and a clean seal, when the silicone skirt stiffens, cracks or turns tacky, when the lens is scratched enough to distort your view, or when the frame cracks. An annual check of the skirt, lens and buckles is plenty for most divers.
Do I need prescription lenses, or will contacts do?
Both work. Soft contact lenses under a standard mask are the simplest fix for most corrections. If you can’t or don’t want to wear contacts in the water, a twin-lens mask with corrective optical inserts is the alternative — single-lens and frameless masks generally can’t take them.
Start from how you dive — the right mask follows.
You’ve got the fit test and the trade-offs. Now pick the range built for your kind of diving and find a mask that seals.