Ocean Reef Neptune III Package - Black Mask + INT 1st Stage
Ocean Reef Neptune III Package - Black Mask + INT 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 Mask + INT 1st Stage - Black / S/M (Small / Medium) is backordered and will ship as soon as it is back in stock.
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Regular price $1,489.95Unit price
Product Information
The Ocean Reef Neptune III Package is a full-face dive mask system that pairs the Neptune III Full Face Mask with an integrated second-stage regulator, a choice of SL 35 TX first stage in DIN 300 or INT 232 Bar configuration, hoses, octopus, pressure gauge, backup mask pouch, and a dedicated backpack. It is EN 250:2014 compliant, CE marked as Category III Personal Protective Equipment, and cold-water certified below 10°C.
Who it is for
This package is built for divers who want to breathe naturally through the nose and mouth instead of biting a mouthpiece, eliminating jaw fatigue over a dive. A six-strap head harness with fast-rotating buckles, a Doffing Handle for quick-release, and a Surface Air Valve are built in, while built-in communication system compatibility and an Extender Kit for mounting cameras or lights suit divers who want to add accessories to their rig.
Key details
The visor is transparent polycarbonate with a siloxane resin coating, tested to a 540 kph impact standard and tested per STANAG 4296. The face seal uses a patented double "S" bellows silicone skirt. The SL 35 TX first stage is a balanced diaphragm design with an anti-freeze kit, 2 HP ports (7/16-20 UNF) and 4 MP ports (3/8-24 UNF), delivering an intermediate pressure of 9.5 to 9.8 bar (138 to 142 psi) and a flow rate of 4800 l/min at 140 bar. The octopus weighs 230 g without hose and is rated to 50 m (162 ft). The pressure gauge reads 0 to 350 bar (0 to 5000 psi) in 10 bar increments with a red zone from 0 to 50 bar (0 to 725 psi). The Neptune III Full Face Mask carries a lifetime warranty; all other components carry a 2-year warranty.
Compatibility and sizing
The mask is available in Black, White, or Blue, and in two sizes based on nose-to-chin distance: Small/Medium for 10 to 11.5 cm, and Medium/Large for over 11.5 cm. The first stage is sold as SL 35 TX DIN 300 or SL 35 TX INT 232 Bar.
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 (INT or DIN configuration)
- Standard Hose
- Extraflex Quick Disconnect Hose, 80 cm (32 in), black
- Octopus with quick disconnect, male quick connection pre-assembled
- Yellow Extraflex quick connection hose, 120 cm
- BAR/PSI Pressure Gauge, single-piece brass body
- BUMP backup mask and snorkel in storage pouch with 2 D-rings and belt loop
- Neptune III Backpack with dedicated mask compartment and draining mesh lower compartment
- Multitool
DiveCatalog.com is an authorized Ocean Reef dealer and a dive shop in Irvine, California, serving divers since 2003. Call 888-701-4017 or chat with us if you have questions about sizing, first stage choice, or fit before you order.
- Integrated second-stage regulator lets you breathe naturally through your nose and mouth with no mouthpiece to bite.
- Patented air-circulation system is designed to eliminate fogging and flooding inside the mask.
- Polycarbonate visor has a siloxane resin coating, is tested to a 540 kph impact standard, and tested per STANAG 4296.
- Double "S" bellows face seal uses a patented silicone skirt with a spring profile.
- Six-strap head harness uses a fast-rotating buckle system for donning and fit adjustment.
- Doffing Handle allows quick-release of the mask.
- Surface Air Valve is built into the mask.
- Dive/Pre-dive lever and purge button manage Venturi effect and water expulsion.
- Extender Kit allows mounting of cameras or lights.
- Built-in communication system compatibility supports add-on communication hardware.
- SL 35 TX first stage is a balanced diaphragm design with an anti-freeze kit, available in DIN 300 or INT 232 Bar.
- Quick-disconnect octopus and hoses include a 120 cm yellow Extraflex hose and an 80 cm (32 in) black Extraflex quick-disconnect hose.
| Sizes | Small/Medium (nose-to-chin 10 to 11.5 cm) or Medium/Large (over 11.5 cm) |
| Mask Dimensions | 14 in W x 14 in H x 10 in D |
| Visor | Transparent polycarbonate with siloxane resin coating, tested to 540 kph impact standard, STANAG 4296 |
| Face Seal | Patented double "S" bellows silicone skirt with spring profile |
| First Stage Options | SL 35 TX DIN 300 or SL 35 TX INT 232 Bar |
| First Stage Type | Balanced diaphragm design with anti-freeze kit |
| First Stage Ports | 2 HP ports (7/16-20 UNF), 4 MP ports (3/8-24 UNF) |
| Intermediate Pressure | 9.5 to 9.8 bar (138 to 142 psi) |
| Flow Rate | 4800 l/min at 140 bar |
| Octopus Weight | 230 g (without hose) |
| Octopus Max Depth | 50 m / 162 ft |
| Standard Hose (Octopus) | 120 cm, yellow Extraflex, quick-connect |
| Extraflex QC Hose | 80 cm (32 in), black, four-layer construction |
| Pressure Gauge Range | 0 to 350 bar / 0 to 5000 psi |
| Pressure Gauge Red Zone | 0 to 50 bar / 0 to 725 psi |
| Pressure Gauge Increments | 10 bar |
| Certifications | CE marked, Category III PPE (EU 2016/425), EN 250:2014 compliant, cold-water certified below 10°C, EU Type Examination Module B, ISO 9001:2015 |
| Warranty | Lifetime on the Neptune III Full Face Mask; 2 years on all other components |
| Color Options | Black, White, Blue |
- Neptune III Full Face Mask with integrated second-stage regulator
- Doffing Handle
- Surface Air Valve
- Extender Kit
- 1st Stage SL 35 TX (INT or DIN configuration)
- Standard Hose
- Extraflex Quick Disconnect Hose, 80 cm (32 in), black
- Octopus with quick disconnect, male quick connection pre-assembled
- Yellow Extraflex quick connection hose, 120 cm
- BAR/PSI Pressure Gauge, single-piece brass body
- BUMP backup mask and snorkel in storage pouch with 2 D-rings and belt loop
- Neptune III Backpack with dedicated mask compartment and draining mesh lower compartment
- 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 the difference between the INT and DIN first stage options on the Neptune III Package?
The package comes with either the SL 35 TX DIN 300 or the SL 35 TX INT 232 Bar first stage. Both are balanced diaphragm designs with an anti-freeze kit, 2 HP ports and 4 MP ports, and deliver an intermediate pressure of 9.5 to 9.8 bar. Choose the configuration that matches your tank valve: DIN or INT (Yoke).
What color and size combinations are available for the Neptune III Package?
The Neptune III Package is offered in Black, White, or Blue, and in two sizes: Small/Medium (nose-to-chin distance of 10 to 11.5 cm) or Medium/Large (over 11.5 cm). Color and size are selected independently, so any color is available in either size.
What is included in the box with the Ocean Reef Neptune III Package?
The package includes the Neptune III Full Face Mask with integrated second-stage regulator, a Doffing Handle, Surface Air Valve, Extender Kit, SL 35 TX first stage, a 120 cm yellow Extraflex hose, an 80 cm black Extraflex quick-disconnect hose, an octopus, a brass BAR/PSI pressure gauge, a BUMP backup mask and snorkel pouch, a Neptune III Backpack, and a multitool.
What is the warranty on the Ocean Reef Neptune III Package?
The Neptune III Full Face Mask itself carries a lifetime warranty. All other components in the package, including the first stage, octopus, hoses, pressure gauge, and backpack, carry a 2-year warranty.
