Mares Abyss 22 Navy II Review: US Navy Approved For Cold Water Diving


. minute Read

In this review, we are going to look a the all-new Mares Abyss 22 Navy II. An upgraded version of popular record-breaking Abyss 22, this is Mares’ answer to a scuba regulator that can withstand any dive condition.

Designed to meet and surpass the rigorous requirements for cold water diving set by the US Navy,  the result is a regulator that is robust in all dive conditions. 

In this review, you find out what makes this regulator so unique and what makes it stand out from other regulators on the market today.

Let get started…

Mares Abyss 22 Navy II


Our Score:

Overall Score
Design 10/10
Functionality 9/10
Durability 10/10
Price 10/10

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  • Excellent breathing performance and reliability - even in extreme cold water conditions
  • Stable intermediate pressure enabling the use of a more reliable 2nd stage downstream demand valve
  • Great value-to-price ratio
  • Unbalanced 2nd Stage
  • No diver adjustments

The Mares Abbys 22 Navy II utilizes an envirmomentally first stage and all metal technology to produce consistent perfomance in all tmeprature exptremes – especailly in cold water. The result is a regulator that delivers high performance and reliabity even while diving under the ice. 

Mares Abyss 22 Navy II Review Video

Below is a complete overview of the Mares Abyss 22 Navy done by the guys over at In the video, you can get a closer look at the regulator and some of its great features.

Mares Abyss 22 Navy II: Key Features and Benefits

New Lightweight 1st Stage 

To help reduce the overall weight of the MR22 First Stage, Mares has stripped it of all unnecessary metal without compromising the structural integrity of the regulator.

This reworking of the design increases the surface area of the first stage, giving it even better thermal characteristics on cold water dives – making an already reliable regulator even more reliable.

Dynamic Flow Control

It also uses Mares’ patented “Dynamic Flow Control” (DFC) system, which minimizes the drop in intermediate pressure on inhalation, especially in extremely demanding dive conditions.

This is one of the main reason this first stage was able to break the record for the most number of divers breathing from a single first stage. You will never have to push the regulator to these extremes, but it is assuring to know it’s there when you need it.

Environmentally Sealed

To further increase its reliability in cold water, the Navy 22 Abyss II also features an Environmentally Sealed first stage.  This kit prevents cold water from entering the spring chamber away from the internal mechanism. The result is the airflow of the regulator is not affected by the cold water, making for more reliable operation.

All-metal Second Stage

The Mares Abyss 22 second stage regulator features an all-metal construction. This provides great thermal properties, preventing the formation of ice that can cause unwanted free flows when diving in extreme temperatures.

Tri-Material Valve Technology

The overall performance, safety, and reliability have also been enhanced by the use of Mares patented Tri-Material Valve.

Thanks to this special technology the head of the valve always provides a perfect seal, even under extreme conditions, and prevent uncontrollable free from occurring even under the most stressful conditions.

Mares Vortex Assisted Design

There is also no user controls on the second stage. This is due to “Mares Vortex Assisted Design” (VAD) System and Mesh Grid Technology.

The VAD System uses a bypass tube to deliver air directly to the mouthpiece. This creates a vortex inside the second stage that keeps the diaphragm down during inhalation, providing lower breathing resistance at any depth.

Mares Mesh Grid Technology 

A mesh grid incorporated into the front cover of the second stage lowers the effect that water flow has on the diaphragm, helping to prevent free flows in strong currents.

Reliable Demand Valve System

It also uses a downstream demand valve system. Mares claims the DFC system, which minimizes the drop in the intermediate pressure during inhalation, allowed them to use a simple and reliable downstream valve system without sacrificing any performance.

Mares Abyss 22 Navy II: Specifications

1st Stage Type

Balanced Diaphragm

High Pressure Ports


Low Pressure Ports


Environmentally Sealed

Second Stage Type


Adjustable Inhalation

Adjustable Venturi

Nitrox Compatible

Cold Water Rated

Compare Scuba Regulators

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Our Rating: Mares Abyss 22 Navy Regulator 



It features 1 HP and 2 LP port on each side of the first stage for optional house routing. The second stage is comfortable and easy to purge with gloves.



The Abyss 22 Navy II performs flawlessly in all diving conditions, especially cold water. However, some see no diver adjustments as a drawback.



It's all metal construction is designed to last a life time and environmental sealing ensures that it works flawlessly between servicing. 



The Abyss 22 Navy II is not a cheap regulator. However, compare to similar high performance regulators you cannot go wrong with the price.  

What Divers Liked

Many divers who own the Mares Abyss 22 Navy II  rank it extremely favorable online for it breathability, performance, weight, and value for money.

It also ranked highly among both beginners and advanced divers alike, with high praises for the equipment saying ‘it performs over and above expectations’ and ‘Best overall regulator on the market’. Almost all those who purchase were likely to recommend the Abyss to a friend.

Reviewers also speak highly of the functionality and the fulfillment of the promises made by the product. It has been put to the test by divers in a range of environments including areas with heavy current, wrecks, deep water, and especially cold water. One reviewer remarked, ” Easy to tune, never freezes up and we do a ton of cold water diving! Breathes so good!”

Many also praise the effortless and easy breathing the device offers with comments like, ‘breaths like a dream in the shallows as well as at deeper than normal sports diving’.

What Divers Didn’t Like

While negative reviews of this regulator were hard to come by, there were a couple of things some divers didn’t like about the regulator.

Some drivers didn’t like the fact that the regulator sat a little bit high on the cylinder and would bang their head on it. However, after mastering the height at which to mount their BCDs this became less of a problem.

Other divers also didn’t like the fact that there were no user-adjustable settings on the second stage – especially when getting too much air from the vortex system. But, others find that the regulator worked great.

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Frequently Asked Questions

Does this regulator work in warm water as well?

What does the AMU printed on the regulator mean?

Is this regulator Nitrox Compatible?

The Bottom Line

The bottom line is, the improvements made to the Maress Abyss 22 Navy II makes an already great regulator even better.

Its high-performance first stage and lightweight second stage work together to deliver a natural breathing response even in the most severe diving conditions. It earned top ratings from us and other reviewers alike and stands up pretty well with the biggest competitors.

Still Looking For The Right Scuba Regulator?

Find the best scuba regulator for your next dive trip by checking out our list of the top 10 Scuba Regulators available on the market today. 

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