Ocean Reef Neptune III System

OCEAN REEF NEPTUNE III System

NEPTUNE III + is the ultimate full-face mask for divers who want an unparalleled underwater experience. With enhanced visibility and communication capabilities, this product is suitable for any qualified diver.

The Ocean Reef Neptune III System consists of:-

• NEPTUNE III Integrated Diving Mask
• 30 Features Backpack
• SL35TX DIN or YOKE 1st stage regulator w/ Standard Hose
• QRS (Quick Removal System)
• Extender Frame Accessories
• Multitool
• Stickers to show off you’re an OCEAN REEF addicted.

How to measure?

To measure for size on the Ocean Reef Neptune III full-face mask, you'll want to take a face length measurement—this helps determine whether you need a Small/Medium (S/M) or Medium/Large (M/L) size.

Here’s how to do it:

✅ Step-by-Step: Measuring for the Neptune III Mask

1. Stand in front of a mirror or have someone help.

2. Using a flexible tape measure or string:

   • Measure from the bottom of your chin to the bridge of your nose (just between your eyes).

   • Keep the tape vertical and tight to your face.

3. Compare your measurement to Ocean Reef's size guide:

If your measurement is right on the border (around 11.5 cm) and your face is narrower or you are on the smaller side overall, consider going with S/M. If your face is broader, go with M/L.

🔧 Additional Fit Tips:

• A proper seal is essential. If you’re between sizes, try one on if possible.

• The Neptune III has improved ergonomics and a better field of view than previous models, so even long-time Ocean Reef users should recheck sizing when upgrading.

Not quite what you are looking for then have a look at the full range of Ocean Reef  products

This item will allow you to purchase when we are out of stock. On purchase we will order directly for Ocean Reef, delivery subject to customs will be 7 - 10 days. "Special Product / Order"

Last Updated: March 2026