Open Box Full Face Snorkeling Masks — Breathe Through Your Nose

A full face snorkeling mask covers the whole face and integrates the snorkel into the top, letting you breathe naturally through your nose and mouth instead of clenching a mouthpiece. For people who find a conventional snorkel awkward — which includes a lot of first-time snorkelers and children — it removes the main barrier to enjoying the water.

These are returned frequently for sizing, since the seal depends on face dimensions and there's no way to know without trying. Every item is inspected and graded before listing; see Product Conditions for full definitions.

Fit Is a Safety Matter, Not Just Comfort

Full face masks rely on a complete seal around the entire perimeter of the face to work correctly. A gap lets water in, and because the mask covers your nose and mouth together, water entering is more disruptive than in a conventional mask.

Measure from the bridge of your nose to the bottom of your chin and match that against the manufacturer's sizing chart — most use a small/medium and large/extra-large split based on this measurement. Facial hair interferes with the seal, and a beard will usually prevent one entirely.

Important Limitations

• Surface snorkeling only. These are not scuba masks and must never be used with compressed air. They are also not suited to breath-hold diving to depth — the internal volume cannot be equalised the way a conventional mask can.
• Look for a quality dry-top valve. The float valve at the top of the tube seals when submerged. This is the mechanism that keeps water out, and it's the part worth checking.
• Ventilation design matters. Well-designed masks separate the inhale and exhale airflow paths to prevent CO2 building up in the breathing chamber. Cheap unbranded masks have historically been poor at this.
• Not for exertion. Full face masks suit relaxed floating and gentle swimming. They're not appropriate for hard swimming or any activity requiring heavy breathing.

Why Buy Open Box Full Face Masks from DiveCatalog.com?

• Inspected and graded — condition stated clearly on every listing
• Reputable brands only — we stock established manufacturers rather than unbranded imports
• Expert sizing advice — send us your nose-to-chin measurement and we'll confirm the size
• Fast shipping — in-stock items ship within one business day
• 30-day returns — with RMA approval; see our Returns & Exchanges page
• Rewards program — earn points on every purchase

Frequently Asked Questions

How do I size a full face mask?

Measure from the bridge of your nose to the bottom of your chin and compare against the manufacturer's chart. Most brands offer two sizes based on this measurement. Facial hair will usually prevent a proper seal regardless of size.

Can I use one for scuba diving?

No. These are surface snorkeling masks and must never be used with compressed air. Scuba full face masks are entirely different products with integrated regulators, and they require specific training.

Can I dive down while wearing one?

Not to any meaningful depth. The large internal air volume cannot be equalised the way a conventional mask can, which causes uncomfortable and potentially harmful pressure on the face. These are designed for floating and swimming at the surface.

Do open box masks come with a warranty?

No. Open box and used products are not eligible for manufacturer warranty coverage.

Browse the full collection above, or see Open Box Snorkeling and all Open Box & Used gear.