Hollis Mask

Hollis Masks — Unmatched Visibility, From Reef to Cave

A mask is the most personal piece of dive equipment you own — fit and field of view affect every single dive, every single time. Hollis builds masks the same way it builds the rest of its lineup: low-volume designs, clear optical glass, and a fit philosophy informed by technical diving, where a leaking or fogging mask in an overhead environment is a genuinely serious problem rather than just an annoyance.

At DiveCatalog.com, we carry the current Hollis mask lineup: the M-1, M3, M4, and the modular full-face MOD-1. DiveCatalog.com is an authorized Hollis dealer.

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The Hollis Mask Range

M-1 — Single-Lens, Low-Volume

The M-1 is Hollis's single-lens mask — a long-running, widely respected design known for a secure fit and a notably wide field of view for a low-volume frame. It's particularly popular in Australia, where it's frequently cited as a top-selling mask across the diving community. Available individually or bundled with the Oceanic Ultra-Dry 2 snorkel and Hollis F1 LT fins as a complete package.

M3 — Dual Lens

The M3 uses a dual-lens design, which some divers find provides a more natural field of view and easier nose-pinching for equalization compared to a single-pane mask, while maintaining Hollis's low-volume philosophy.

M4 — Frameless, Low Volume

The M4 strips the mask down to a frameless silicone skirt directly bonded to the lens — reducing bulk, weight, and the volume of air (and water, in a flood scenario) the mask holds. A frameless design also tends to fold flat for travel, a practical bonus for divers packing multiple mask options.

MOD-1 — Modular Full-Face Mask

The MOD-1 is Hollis's modular full-face mask, sold without the communication pod for divers building a custom configuration. A full-face mask covers the entire face rather than just the eyes and nose, providing airway protection, the ability to breathe normally through the nose, and (with the appropriate pod) underwater communication capability — used in technical, commercial, and public safety diving applications where these factors matter.

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Choosing Your Hollis Mask

Diver Type	Recommended Mask	Key Reason
Divers wanting a proven, wide-field single-lens mask	M-1	Long-running, widely respected design; secure fit; wide field of view
Divers who prefer dual-lens equalization	M3	Dual-lens design for natural nose access and field of view
Divers wanting minimal bulk and easy packing	M4	Frameless construction; low volume; folds flat for travel
Technical, commercial, or public safety divers	MOD-1	Full-face protection; modular configuration; communication-ready

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Why Buy Hollis Masks from DiveCatalog.com?

• Authorized Hollis dealer — genuine products, full manufacturer warranty
• Full range available — M-1, M3, M4, and MOD-1, plus replacement straps
• Expert fit advice — our team can help you choose the right mask for your face shape and diving
• Fast shipping — in-stock items ship within one business day
• Rewards program — earn points on every purchase

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Frequently Asked Questions — Hollis Masks

What is the difference between the M-1 and M3?

The M-1 uses a single-lens design; the M3 uses a dual-lens design. Some divers find dual-lens masks easier for equalization (pinching the nose) and prefer the field-of-view characteristics, while single-lens masks like the M-1 are prized for their notably wide field of view in a low-volume frame.

What does "low volume" mean for a mask?

A low-volume mask sits closer to the face, holding less internal air space. This makes equalizing the mask easier on descent, reduces the effort needed to clear the mask if water enters, and generally creates a more streamlined, less obtrusive feel underwater.

What is the MOD-1 and who needs it?

The MOD-1 is a modular full-face mask covering the entire face rather than just the eyes and nose. It's used in technical, commercial, and public safety diving where airway protection, normal nasal breathing, and underwater communication (with the appropriate pod, sold separately) are operational requirements. It's not typically necessary for standard recreational diving.

How do I find the right mask fit?

A proper mask seal comes from fit, not strap tightness — place the mask on your face without the strap and inhale gently through your nose; it should stay in place on suction alone if the seal is correct. Face shape varies significantly between individuals, so trying multiple models is the most reliable way to find your best fit.

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Browse the full Hollis mask collection above and reach out if you'd like help finding the right fit for your face shape and diving.