Ocean Reef Neptune III Package - Black S/M Mask + DIN 1st Stage
Ocean Reef Neptune III Package - Black S/M Mask + DIN 1st Stage - Black / S/M (Small / Medium) is backordered and will ship as soon as it is back in stock.
Pickup currently unavailable at In Store
Ocean Reef integrated dive mask sizing. Imperial in bold, metric underneath.
| Size | Nose bridge to chin in · cm |
|---|---|
| S/M |
3.9–4.5 10–11.5 |
| M/L |
>4.5 >11.5 |
How Ocean Reef measures
It is essential to choose a suitable size. You can choose between size S/M (for adults with smaller faces, women and children over 12 years old) and size M/L (for an adult male, or larger faces).
- Nose bridge to chin: Measure the distance between the bridge at the top of your nose and the bottom of your chin.
- Try-on: There are two different size categories on the chart: Small/Medium and Medium/Large. If the measurements fall within the both ranges, 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. Once the mask is tight on your face, if there is NO SPACE between your chin and the silicone skirt of the mask, you've got the right size.
Source: Ocean Reef’s size chart (original chart). Values in the second unit come from Ocean Reef’s own chart where it prints them.
Ocean Reef Neptune III Package - Black S/M Mask + DIN 1st Stage - Black / S/M (Small / Medium) is backordered and will ship as soon as it is back in stock.
-
DiveCatalog.com Silicone Frameless Dive Mask
$59.95$6.00
1 -
DiveCatalog.com Retro Oval Dive Mask Without Nose Pocket Compensator
$44.95$4.50
1 -
DiveCatalog.com Classic Oval Dive Mask Silicone
$44.95$4.50
1 -
DiveCatalog.com Metal Coil Lanyard with Snap Clips
$39.95$4.00
1 -
DiveCatalog.com Junior Rubber Oval Dive Mask (15% smaller)
$34.95$3.50
1
-
DiveCatalog.com Compact Dive Knife
$34.95$3.50
1 -
DiveCatalog.com Dive Retractor
$34.95$3.50
1 -
DiveCatalog.com Auto Lock Retractor 90cm - Black
$34.95$3.50
1 -
DiveCatalog Dive Essentials - Auto-Rebound Style Retractor
$39.95$4.00
1 -
DiveCatalog Quick Release Coil Lanyard with Buckle Scuba Essentials
$29.95$3.00
1 -
DiveCatalog.com Air Gun - Blue
$27.95$2.80
1 -
DiveCatalog.com Folding Dive Knife
$32.95$3.30
1 -
DiveCatalog.com Diving Double Layer Slate Palm Size (5x7.25") with Pencil
$26.95$2.70
1 -
DiveCatalog.com Line Cutter
$24.95$2.50
1 -
DiveCatalog.com Semi-Dry Snorkel
$23.95$2.40
1 -
DiveCatalog.com Nylon Weight Belt
$22.95$2.30
1 -
DiveCatalog.com Finger Reel with Bolt Snap
$26.95$2.70
1 -
Nocturnal Lights Adjustable Goodman Handle with 1 / 4 Mounting Points HM.GM
$47.99$4.80
1 -
Nocturnal Lights Triple Ball Joint Clamp standard 1 balls BJCLAMP.TRIPLE
$27.99$2.80
1 -
Nocturnal Lights Ball Joint Clamp fits all standard 1 balls BJCLAMP.DOUBLE
$23.99$2.40
1 -
Nocturnal Lights T-base Connector for Ikelite quick release handles TBASE.IKEQR
$23.99$2.40
1 -
Nocturnal Lights YS Arm Adapter for M700 Lights ADP.M7YS
$19.99$2.00
1 -
Nocturnal Lights Ball Joint Adapter for Underwater Ball Joint Arm Strobe and Lighting Systems
$19.99$2.00
1 -
Nocturnal Lights 45 Degree Ball Joint Adapter with T-base Slot BJADAPTER.TBASE45
$18.99$1.90
1 -
Nocturnal Lights 90 Degree Ball Joint Adapter with T-base Slot BJADAPTER.TBASE90
$15.99$1.60
1
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.
Product Information
The Ocean Reef Neptune III Package is a complete full-face diving system that integrates a vertical, body-balanced second-stage regulator directly into the mask and pairs it with a dedicated SL 35 TX first stage, available in DIN 300 or INT 232 Bar (Yoke) configuration. It is CE marked as Category III Personal Protective Equipment, built to EN 250:2014, and rated for use in water below 10°C (50°F).
Who it is for
This package is for divers who want a full-face mask setup rather than a traditional mask-and-regulator combination, with the second stage fully built into the mask so there is no separate mouthpiece to hold. It ships as a full kit, with a backup conventional mask included, so a diver has everything needed to set up a complete full-face system, including the first stage, octopus, pressure gauge, and backpack. The mask is available in Black, White, or Blue, and in S/M or M/L sizing.
Key details
- First stage: SL 35 TX with 2 HP ports and 4 MP ports, static intermediate pressure of 9.5 to 9.8 bar, and an approximate flow rate of 4,800 l/min at 140 bar.
- Octopus: 230 g without hose, a 120 cm yellow quick-connect hose, and a maximum depth rating of 50 m / 162 ft.
- Pressure gauge: 0 to 350 bar / 5000 psi, dual scale.
- Visor: transparent polycarbonate coated in siloxane resin, impact tested with a steel ball traveling at 540 kph (335 mph).
- Head harness: six straps.
- Warranty: lifetime on the Neptune III mask itself, 2 years on all other included components.
Compatibility and sizing
Sizing is measured from the bridge of the nose to the bottom of the chin: S/M fits 10 to 11.5 cm (3.9 to 4.5 in), and M/L fits more than 11.5 cm (4.5 in and up). The first stage is offered in DIN 300 or INT 232 Bar (Yoke), so match the configuration to your tank valve. The mask is compatible with Ocean Reef communication systems.
What's in the box
- Neptune III Full Face Mask with integrated second stage regulator
- Doffing handle
- Surface air valve
- Extender kit
- 1st stage SL 35 TX (DIN or INT/Yoke, per configuration)
- Standard hose
- Extraflex quick disconnect hose
- Octopus (secondary regulator) with quick disconnect hose
- BAR/PSI pressure gauge
- BUMP backup mask with rollup snorkel
- Neptune III backpack
- Multitool
DiveCatalog.com is an authorized Ocean Reef dealer and a dive shop in Irvine, California, serving divers since 2003. Call or chat with us at 888-701-4017 if you have questions about sizing, DIN versus Yoke, or fitting this package to your current setup.
- Integrated second stage: The regulator is fully built into the mask, so there is no separate mouthpiece to hold or lose.
- Body-balanced second stage: The vertical, body-balanced design is built for smooth breathing at any depth.
- Air-circulation system: A patented internal system is designed to minimize fogging and reduce CO/CO2 buildup inside the mask.
- 3D Equalization System: A patented internal device closes the nostrils for underwater equalization.
- Bellows face-seal design: A patented 'floating effect' seal design is used for the face skirt.
- Purge button: Lets the diver manually expel water from inside the mask.
- Communication-ready: Compatible with Ocean Reef communication systems.
- Six-strap head harness: Secures the mask to the diver's head.
- Backup mask included: A BUMP conventional backup mask with rollup snorkel ships with every package.
- CE Category III PPE: EU Type Examination certified by Notified Body No. 0477, with production quality supervised by Notified Body No. 0426.
| First Stage Model | SL 35 TX |
| First Stage Options | DIN 300 or INT 232 Bar (Yoke) |
| First Stage Ports | 2 HP ports, 4 MP ports |
| First Stage Static Intermediate Pressure | 9.5 to 9.8 bar |
| First Stage Approx. Flow Rate | 4800 l/min at 140 bar |
| Octopus Weight (without hose) | 230 g |
| Octopus Maximum Depth | 50 m / 162 ft |
| Octopus Hose | Yellow quick-connect hose, 120 cm length |
| Pressure Gauge Range | 0 to 350 bar / 5000 psi, dual scale |
| Visor Material | Transparent polycarbonate coated in siloxane resin |
| Visor Impact Test | Steel ball traveling at 540 kph (335 mph) |
| Head Harness | Six straps |
| Sizing S/M | Nose bridge to chin 10 to 11.5 cm (3.9" to 4.5") |
| Sizing M/L | Nose bridge to chin more than 11.5 cm (4.5"+) |
| Cold Water Rating | Suitable for use below 10°C |
| Color Options | Black, White, Blue |
| Certifications | CE marked, Category III PPE (EU Regulation 2016/425), EN 250:2014 |
| Notified Bodies | EU Type Examination No. 0477, Production Quality Assurance No. 0426 |
| Warranty | Lifetime on the Neptune III mask, 2 years on all other components |
- Neptune III Full Face Mask with integrated second stage regulator
- Doffing handle
- Surface air valve
- Extender kit
- 1st stage SL 35 TX (DIN or INT/Yoke, per configuration)
- Standard hose
- Extraflex quick disconnect hose
- Octopus (secondary regulator) with quick disconnect hose
- BAR/PSI pressure gauge
- BUMP backup mask with rollup snorkel
- Neptune III backpack
- Multitool
⚠️ 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.
What is included in the Ocean Reef Neptune III Package?
The package includes the Neptune III full-face mask with its integrated second-stage regulator, a doffing handle, surface air valve, extender kit, the SL 35 TX first stage (DIN or INT/Yoke per configuration), a standard hose, an Extraflex quick disconnect hose, an octopus with quick disconnect hose, a BAR/PSI pressure gauge, a BUMP backup mask with rollup snorkel, a Neptune III backpack, and a multitool.
Should I choose the DIN or INT (Yoke) first stage for the Neptune III Package?
The SL 35 TX first stage is offered in DIN 300 or INT 232 Bar (Yoke) configuration, so the choice depends on your tank valve type. DIN connects directly into a threaded valve insert, while INT/Yoke clamps over a standard valve. Match the configuration to the tank valves you dive with most often.
What is the warranty on the Ocean Reef Neptune III Package?
The Neptune III mask itself carries a lifetime warranty. All other components in the package, including the first stage, octopus, pressure gauge, and backup mask, carry a 2 year warranty.
How deep is the octopus regulator in the Neptune III Package rated for?
The included octopus (secondary regulator) is rated to a maximum depth of 50 m / 162 ft. It weighs 230 g without its hose and connects via a yellow quick-connect hose that is 120 cm long.
