When I started freediving after years of pool swimming, I made what seemed like a logical decision: I’d just use my swim goggles. Same thing, right? Both keep water out of your eyes.
My first attempt at a 10-meter dive taught me otherwise. At depth, my goggles squeezed painfully against my eye sockets, and I couldn’t equalize the pressure inside them. I surfaced with raccoon eyes that lasted two days.
Swim goggles and freediving masks are designed for completely different purposes. Here’s how to choose the right one.
The Fundamental Difference: Nose Access
This is the key distinction that explains almost everything else.
Swimming goggles cover only your eyes. Your nose is exposed to the water. This works fine for surface swimming because there’s minimal pressure change—you’re not going deep enough for it to matter.
Freediving masks cover both your eyes and nose in a single air pocket. This is critical because as you descend, water pressure compresses the air inside the mask. With your nose inside, you can exhale a small amount of air to equalize the pressure and prevent the mask from squeezing painfully against your face.
Try equalizing a pair of swim goggles at depth. You can’t—there’s no way to add air to that space. The deeper you go, the more the goggles crush into your eye sockets.
When to Use Swimming Goggles
Swim goggles are the right choice for:
- Pool swimming (any stroke, any distance)
- Open water surface swimming
- Triathlons and swim races
- Snorkeling in shallow water where you’re not diving down
The advantages of goggles for these activities:
Lower drag: Goggles sit flush against your face with minimal profile. A freediving mask would create significant resistance, especially at racing speeds.
Peripheral vision: Modern swim goggles have wide lenses that let you see to the sides—important for spotting other swimmers, walls, and lane lines.
Stability: The double-strap design keeps goggles locked in place through flip turns, diving starts, and hours of continuous swimming.
Anti-fog options: Many goggles come with anti-fog coatings designed for the frequent surface-to-air transitions of lap swimming.
When to Use a Freediving Mask
You need a proper mask for:
- Freediving (any depth beyond 2-3 meters)
- Scuba diving
- Spearfishing
- Snorkeling where you’ll be duck-diving to explore
Why masks win for diving activities:
Equalization: As mentioned, the nose pocket lets you balance pressure. This isn’t optional—it’s mandatory for any real depth.
Low volume: Freediving masks are designed with minimal internal air space. Less air to equalize means less effort and less air used from your lungs. Look for “low volume” specifically on the label.
Wider field of view: While swimming goggles have good peripheral vision, a quality freediving mask gives you an even broader view—helpful when you’re looking around underwater.
Tempered glass: Most freediving masks use tempered glass lenses that can handle pressure changes and won’t scratch easily.
What About Using One for Both?
I’ve tried this. It doesn’t work well in either direction.
Goggles for freediving: Beyond about 3 meters, the squeeze becomes uncomfortable. Beyond 5 meters, it’s painful. Beyond 10 meters, you risk eye damage. Just don’t.
Mask for pool swimming: Technically possible, but problematic. The mask creates drag that slows you down. The single strap doesn’t stay secure during flip turns. Water tends to enter around the nose pocket when you’re doing surface strokes. And you look a bit ridiculous.
If you do both activities, you need both pieces of gear. Sorry.
What to Look for in Swimming Goggles
My recommendations after trying probably 15 different pairs:
- Fit is everything: Press the goggles to your eyes without the strap. They should suction lightly and stay for 2-3 seconds. If they fall immediately, they’ll leak.
- Lens tint: Clear for indoor pools, tinted or mirrored for outdoor swimming. I keep both.
- Adjustable nose bridge: Faces vary. Being able to adjust the width between lenses helps dial in the fit.
- Price doesn’t matter much: My favorite goggles cost $15. Some $40 goggles I’ve tried were worse.
What to Look for in a Freediving Mask
Different priorities here:
- Low volume: The most important spec for freediving. Less air space = easier equalization = longer dives.
- Silicone skirt: The soft part that seals against your face should be high-quality silicone, not rubber. It lasts longer and seals better.
- Nose pocket design: Make sure you can easily pinch your nose through the mask for Valsalva or Frenzel equalization. Some masks make this awkward.
- Black skirt vs clear: Black blocks peripheral light for better focus; clear lets in more light. Personal preference.
- Price matters more: Cheap freediving masks often have poor seals and uncomfortable fits. Expect to spend $50-100 for something decent.
Quick Wins
- Never use swim goggles for freediving—the pressure squeeze will hurt you
- Freediving masks must be low-volume with nose access for equalization
- If you do both activities, accept that you need both pieces of gear
- For goggles, prioritize fit; for masks, prioritize low volume
Bottom Line
Swim goggles and freediving masks look similar but serve completely different purposes. The nose access on a mask isn’t a bonus feature—it’s the fundamental requirement for diving to any real depth. Use the right tool for the job, and your eyes (and dive experience) will thank you.