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OCEAN REEF Neptune Space Iron Mask Diving Full Face Mask with Integrated 2nd Stage Regulator

SKU: ORI-OR025021 Rate this product


Availability: Usually ships 1 weeks after receipt of order

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Neptune Space Iron Mask:

  • Specifically designed for use by professional divers
  • Maximum performance in all temperatures and diving conditions - including ice diving
  • Nitrox compatible to 40% (the recreational limits of nitrox)
  • Integration of the second stage and a full face mask
  • Positive buoyancy: 0.40 lb (172 g)
  • Reduced internal volume
  • 180 degree field of view
  • Includes surface air valve
  • Anodized anticorodal® front cover
  • Crystal silicone - The highest grade silicone available for a soft comfortable seal
  • Equalization system with a tri-dimensional adjustment to fit every nose shape
  • Exhaust valve features four settings, exhaust at left side, right side, both sides or no exhaust, so it is possible to direct bubbles caused by exhaling
  • Breathe comfortably and naturally through both your nose and mouth
  • Advanced air circulation prevents mask fogging and reduces CO2 build-up
  • Inhalation diaphragm, exhalation valve, purge button and face seal composed of FVMQ rubber
  • Head harness features straps directly connected to the face shield allowing the pressure to be transmitted uniformly along the mask's skirt

Integrated 2nd Stage:

  • Balanced 2nd Stage for superior performance even under the most demanding conditions
  • "Diver Adjustable" air flow allowing the diver to adjust for different operating conditions and depths
  • Designed for use even in low temperatures where normal regulators usually freeze
  • Easily accessible extra large purge button
  • Includes 32 inch low pressure hose for connection to any existing regulator first stage
  • Stainless steel AISI 316 frame, buckles and adjustment knob


  • Color: Black with Red and Gold Accents
  • Size: Medium/Large
  • Total Weight: 2.40 lb (1090 g)

Neptune Space Iron Mask - P/N: ORI-OR025021 Includes:

  • Visor protection
  • Screwdriver
  • Extensions for equalization (3 sets - 3, 6, and 10 mm)
  • Padded zipper bag
  • 32 inch low pressure hose

The Neptune Space Iron Mask is OCEAN REEF's top of the line mask specifically designed for use by professional divers.

The sturdy feeling of the mask's design allows divers to make sensitive micro adjustments to the airflow, even when using gloves. Surface treatments protect the mask from salt water damage and tech polymer protection treatments allow the Neptune Space Iron Mask to be used in extreme conditions. The glacier strap is composed of HNBR rubber compound for extreme low temperatures.

The Neptune Space visor is made of transparent polycarbonate. It is designed to be wider and sit closer to the face than previous full face masks. This design maximizes the visual field, particularly the peripheral area.

Adaptability - Face Seal - Sizes

The patented bellows-type skirt with a “spring profile” has a large sealing surface (30-45 mm, double that of a conventional mask). The spring effect is achieved by a combination of the double “S” section and the inner support ribs, resulting in a comfortable fit and ample support. This allows the mask to “float” comfortably on the face. The face seal and strap concepts are OCEAN REEF patents.

Visual Field

The Neptune Space visor is made of transparent polycarbonate. It is designed to be wider and sit closer to the face than previous full face masks. This design maximizes the visual field, particularly the peripheral area.

Durability and Scratch Resistance

The visor of the Neptune Space can resist the impact of a 6.35 mm steel ball traveling at speeds of 335 mph (540 kph). The visor is coated on both sides with a siloxane resin to increase the scratching and chemical resistance.

The Head Harness and FRB II

The head harness is directly attached to the face shield, allowing pressure to be distributed equally along the mask skirt. The six straps of the head harness hold the mask in a firm position due to their low elasticity. The tip of each strap (rubber) is wider, making them easier to grasp while wearing neoprene gloves. The FRB II (Raptor and Space Fast Rotating Buckle) allows the mask to be donned and doffed quickly. The Iron Mask uses an AISI 316 stainless steel with surface electric treatment and AISI 316 stainless steel rollers.

Air Circulation

The Neptune Space Air Circulation System is designed to minimize fogging and reduce the amount of CO2 buildup. The silicone oral nasal pocket is built with two (2) one-way valves through which air is inhaled. Exhaled air is directed through a valve under the oral nasal pocket, limiting the mixing of the air (containing high amounts of CO2) with the fresh air from the regulator. The direction of exhaled air is controlled by a directional exhaust valve. This adjustable valve allows exhaust to flow in four possible directions: to the left, to the right, both (direction of least resistance), and no exhaust (the "off" position). The “off” position is used when the diver is in a “head-down” position which, due to pressure on the second stage, causes the regulator to free flow. Placing the exhaust valve in the off position causes pressure to build in the mask, preventing free flow and returning the system to an “air on demand” situation.

Surface Air Valve

The Neptune Space is equipped with a surface air valve that allows the diver to breathe ambient air while at the surface. The surface air valve is easily adjustable with large air vents.

3D Equalization System

The patented OCEAN REEF 3D Equalization System is designed to allow easy equalization during a dive. The system consists of a movable plate and two eccentric blocks (these blocks move close to the nostrils when the upper part of the visor is pressed). When equipped with Visor Lights, use the regulator to push the mask toward your face, creating a nasal seal. The blocks plug the diver’s nose allowing equalization. Before donning the mask, the blocks may be moved up or down depending on the length of the diver’s nose. They may also be adjusted to fit wide or narrow noses. The system also includes three pairs of extenders (3, 6, and 10 mm long) which allow the distance between the blocks and the nose to be modified to accommodate the diver’s face. The 3D Equalization System makes diving more comfortable and inhibits any undesired pressure during a dive.

Regulator Characteristics

The Neptune Space Iron Mask is equipped with a pneumatically balanced second stage regulator, providing a consistent ease of breath at any tank pressure. An inhalation adjustment feature allows the diver to control air delivery under a variety of diving conditions. The system works with 2 coaxial springs. The Dive/Pre-Dive (Venturi) lever reduces free flow on the surface and provides maximum air flow while at depth. The Neptune Space Iron Mask complies with CE Certification in accordance with 89/689/EEC directives under the UNI EN250 standard rules for underwater activities, including low temperatures (CE low temperature approval by Germanisher Lloyd).


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