Open Box Ocean Reef Neptune III Package - Diving Full Face Mask
Open Box Ocean Reef Neptune III Package - Diving Full Face Mask - DIN / Black / ML (Medium Large) is backordered and will ship as soon as it is back in stock.
Pickup currently unavailable at 23D
The Neptune Space is available in two sizes, Small/Medium and Medium/Large.The sizing and measuring system were designed in accordance with the official measuring procedure used in the Los Alamos Scientific Laboratory Charts at the SBCCOM Mask Fit Facility-Aberdeen Proving Ground (Maryland, USA). Before purchasing a mask, the customer may use the calliper to take two simple face measurements. Using the Full Face Mask Size Recommendation Chart, he or she can evaluate the size category into which the measurements fall. There are three different size categories on the chart: Small/Medium, Both, & Medium/Large. If the measurements fall within the both category, then the diver should technically be able to wear either full face mask (M/L or S/M), and in that case should try on a mask to select the best fit. Please note that the chart boundaries fade. The fading areas represent less common face measurements. It is very likely that a mask will still fit comfortably even if measurements are located in these fading areas.
Open Box Ocean Reef Neptune III Package - Diving Full Face Mask - DIN / Black / ML (Medium Large) is backordered and will ship as soon as it is back in stock.
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Condition Note
- Open Box: This product is Open Box. It is generally unused, either returned by a customer or displayed in our showroom, and may have minor, unnoticeable blemishes. Original packaging may be damaged or missing.
Description
Description
Discover the most advanced Full Face Mask ever from OCEAN REEF. Diving Full Face Mask w/ int 2nd st, surface air valve, hose, pressure gauge, octopus, bump, quick connection hose, Primary 2nd Stage Regulator (w/ male QD)
Features
Features
Specifications
Specifications
| Mask Type | Full-face |
| Mask Lens Material | Polycarbonate |
| Regulator Material | Chrome-plated brass |
| Number of HP Ports | 2 |
| Number of LP Ports | 4 |
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Why dive with a full-face mask like the Ocean Reef Neptune III?
A full-face mask integrates the second stage regulator into the mask, so there is no mouthpiece to bite and no regulator to lose — you breathe naturally through your nose and mouth, which many divers find far more comfortable and less fatiguing, especially on long or cold dives. The six-strap harness holds it securely, the field of view is wide, and because your mouth is free, the mask is ready for underwater communication systems. It is popular for cold water, public safety, and any diver who wants a more relaxed breathing experience.
What size Ocean Reef Neptune III do I need?
The Neptune III comes in two sizes, measured by the distance from the bridge of your nose to the bottom of your chin: Small/Medium fits roughly 10–11.5 cm (smaller faces, many women, and children 12 and up), and Medium/Large fits above 11.5 cm. The right fit leaves no gap between your chin and the silicone skirt. If you are unsure, measure nose-bridge to chin and send us the number and we will confirm the size.
Is the Ocean Reef Neptune III certified and safe for cold water?
Yes — the Neptune III is CE marked as Category III PPE, compliant with the EN 250:2014 diving standard, cold-water rated for use below 10°C, and tested to 61 meters. A patented internal air-circulation system keeps the lens from fogging and continually flushes exhaled air to minimize CO2 buildup, and a built-in 3D equalization device lets you close your nostrils to equalize without breaking the mask seal. It is a properly certified full-face system, not a surface snorkel mask.
