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  • 1st stage CWD kit for extreme temperature
  • DFC to minimize intermediate pressure drop
  • Tri material valve technology for reliability
  • Reliable 2nd stage downstream demand valve
  • 2nd stage mesh design minimizes free flow

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Mares Abyss 22 Navy II Scuba Diving Regulator Customer Reviews

Review Summary


(based on 8 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Most Liked Positive Review


Best over all regulator on the market

I've used a few regulators and those one has been the best. Easy to tune, never freezes up and we do a ton of cold water diving! Breathes so good!


Most Liked Negative Review


Stage 2

Great first stage no problems in cold water. Unfortunatly, I do not like the Vortex system. It feed you too much air and in order to stop it you have to push pressure back into mouth piece, this causes jaw fatigue. I don't recommend for others by I blocked the Vortex with metal puddy, now it works fine.

Reviewed by 8 customers

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Best over all regulator on the market


from Anchorage, AK, US

I've used a few regulators and those one has been the best. Easy to tune, never freezes up and we do a ton of cold water diving! Breathes so good!


84 dives and counting

By Sebastien B.

from Montreal, QC, CA

I have over 80 dives with regulator and works really well in both cold (fresh) and warm waters. It breathes nicely and is super robust. It does sit a little high on the cylinder and takes some time figuring out the good height of your BCD before you stop banging your head on it but other then that, i cannot find a flaw to this thing. I stongly recommend it.


Best first and second stage on the market

By Karl Z.

from Manila, Metro Manila, PH

This is currently the best first & second stage that you could possibly own. Performs flawlessly as expected in any diving situation. Breathing is simply rock solid. I have full confidence with this unit no matter the purpose the of dive. Indeed,Authorized for Military Use (AMU) as indicated. Forget about fancy overpriced & overrated rigs.


Rock Solid Regulator

By Mark W.

Best of the best. Very durable military approved first and second stage. Breathtaking rock solid performance at any depth. Never had any issues with it at all.


Great in ice and warmer conditions

By IceBoy

I've used this regulator for around 30 dives, with the last ten being freshwater ice dives. In warm water it has been a fine regulator, likely no different from a standard Mares 22. The second stage does tend to freeflow at the surface if the mouthpiece faces up. I've read that this may be a sign of a perfectly tuned regulator. Under ice, it behaved just as well. At the end of my course, we made a deliberate effort to try and freeze it. A minute of rapid breathing had no effect. It took over 30 seconds of continuous purging before the second stage locked. My instructor was very impressed, based on his experience with loads of other ice ready regulators. With that residence, I doubt it will ever freeze in normal use under ice.


Easy Breather

By sgravesmedical

from Toronto, ON, CA

only downside is that it's a bit heavy and once on your tank sits a bit high making it easy to bang your head on it. Once you have mastered the height at which your tank needs to be then you are golden..great reg..


Very Well Made

By Cold B.

I wanted a highly reliable first & second stage for my Deco bottle when tech diving. The Mares Abyss Navy gives me that comfort, knowing that it is reliable at 165 ft, in +3 C water. I'm happy with this product and will recommend it!


Stage 2


Great first stage no problems in cold water. Unfortunatly, I do not like the Vortex system. It feed you too much air and in order to stop it you have to push pressure back into mouth piece, this causes jaw fatigue. I don't recommend for others by I blocked the Vortex with metal puddy, now it works fine.

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Questions & Answers

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Browse 12 questions Browse 12 questions and 38 answers
Which would you recommend when it comes to performance and durability in the most demanding & extreme of conditions? If your life were to depend on it,hands down.

A. Mares Abyss II Navy
B. Scubapro MK25 EVO/A700
A shopper on Apr 7, 2016
BEST ANSWER: Both are good regulators. I have had years of experience with the Mares Abyss and they are almost bullet proof. Hundreds of dives well over 100' in depth in the Pacific Northwest waters as well as Hawaii. I have had the Abyss to 200' depth and it performed extremely well.

I have used and repaired these regulators for years and will continue to do so. we used them commercially for years and they gave us a long life. I don't think you can wrong with either regulator. Scuba pro makes an outstanding regulator and I think it comes down to price and personal preference. Good luck and safe diving.

Hi, What is the difference with the "normal" Abyss 22 regulator? tks!
A shopper on Sep 28, 2011
BEST ANSWER: This adds these features above and beyond the normal current line abyss. CWD cold water insulation kit on the first stage gives more reliable performance in extremely cold waters. 2nd stage black coating prevents any ice crystals that happen to form from sticking and causing problems.
I just purchased the Mares Abyss 22 Navy II. The picture on the site shows it with the Name NAVY printed on it. Mine came with the letters AMU printed on it. What does AMU stand for???
A shopper on Jun 28, 2016
BEST ANSWER: He "AMU" stands for "Authorized For Military Use" It went through rigorous military testing to receive this stamp.
I think they may have gone to AMU per ALL military rather than miss leading every one thinking it was "Navy" only.
Is this a DIN or Yoke first stage?
A shopper on Nov 6, 2013
BEST ANSWER: This is a YOKE first stage. Din adapters are available here:
If not diving in extreme cold is it easy to remove the CWD kit and re-install if needed later?
sgravesmedical on Mar 31, 2014
BEST ANSWER: The end of the 1st stage is sealed with the flexible membrane and the 2nd stage is a normal Abyss with a few components made from higher performance materials. There's not any need to modify anything for warm or cold. I live in Florida and use this regularly in 70 degree water up to mid 80's and it's flawless, but also occasionally dive the Great Lakes and some high altitude in CO.
Think of this in another's built to mil-spec to withstand cold weather and not ice up, but if you don't use it that way, there is no penalty in warm water diving. It works just as easily. It functions basically just like other regs in the abyss line. It uses a diaphragm to adjust airflow at depths, but the casing and internals are designed to not ice up and allow flow to remain normal in more extreme conditions.
Not sure if that answered your question, but hopefully it solved your dilemma.
how many number LP port?
BEST ANSWER: Pretty standard first stage. 4 LP ports and 2 HP ports. I do a ton of dry suit diving so I have my suit, my red and back up reg all hooked up as well as my bcd. All low pressure. Then monolog gauges as well as computer consider so. I have all 6 PORTS used.
does this not come with an environmental cap?
Rich H on May 11, 2018
BEST ANSWER: It comes with the Mares Cold Water Diving Kit, which is an environmental seal
What is the rubberized component, that Michael S. noted?
A shopper on Apr 5, 2014
BEST ANSWER: I believe he was referring to the cold water kit. It is a rubber diaphragm that is on the top of the first stage. There is no cover for it. That is the cold water kit.
I want to buy this reg but with a 300Bar DIN conversion. Which conversion fit on the first stage?
FrancoisVR on Aug 3, 2013
BEST ANSWER: The din conversion kit you need, I believe would be this one:

The Navy is a bit different than Mares' other regulator first stages though, so you may want to contact Mares technical support to make sure.
is this regulator nitrox ready and to what percentage if so ? thanks
A shopper on Sep 7, 2011
BEST ANSWER: Yes, to 40%.
how far down can you go with this reg? and whats the lowest temp you can have it in ? thanks
A shopper on Sep 7, 2011
BEST ANSWER: Mares rates their regs to a max depth of 162 feet, that said if you go to 163 feet and beyond your reg is not going to just stop working, they are used at extreme depths all the time. As for the cold water rating, the certification only specifies it is rated for use below 50 degrees F. This regulator is set up and ready to go for extreme cold water service, if you follow proper cold water diving procedures with this reg it should work great as long as the water is still liquid.
Hi,is this regulator Nitrox compatible? Thank you
A shopper on Sep 7, 2011
BEST ANSWER: Yes all Mares regs we sell are nitrox ready to 40% out of the box.