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IST Pegasus Full Face Silicone Dive Mask

Sometimes, it is the simplest equipment that survives the test of time.

The Pegasus M37 is certainly representative of that concept. This is a serious hardworking mask that’s only available in serious hardworking Black Silicone and Black Rubber. IST has built a reputation that began over 35 years ago with constructing quality masks and snorkels. The Pegasus M37 Full Face Scuba Diving Mask is at the bedrock of that foundation, a mask so solid, it is still most commonly used for commercial diving purposes. The retro M37 is itself almost symbolic of IST’s standing as a long-time supplier of quality, reliable and cost-effective diving products.

Pegasus full-face is a bullet-proof full-strength mask that is capable of protecting divers from extreme cold or grimy, polluted water. The 3-end strap secures the mask evenly creating a positive seal, combined with a soft double feathered edge skirt for a perfect seal every time. Pegasus will give you no jaw fatigue because you don’t have to bite on to the mouthpiece. A wide field of view tempered glass safety lenses will give you great underwater vision.


  • The convenience of demand air, with the comfort of not having to bite the mouthpiece
  • Eliminates jaw fatigue and/or denture slippage
  • Multi-strap adjustment and easy, nose access for equalization
  • Allows for the attachment of most types of regulators
  • Comfort-fitting
  • Adjustable fits all adults
  • Silicone skirt and strap with low volume
  • Tempered glass lenses
  • Maximum vision


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Question asked
on 6/30/2010
concerning the IST Pegasus Full Face Diving Mask , Can I have a prescription added to it? I wear glasses and would need that option.
Answer by scuba
on 7/1/2010
On this mask you could have a prescription added but based on the size of the lens an off the shelf option is not available. You would have to have a custom grind which depending on your correction and or bi focal needs. Please advise your correction, astigmatism, bi focal and we can get you a quote. Also look at our product code 4447.
Question asked
on 3/31/2011
Hi, sorry if this is a really stupid question. I am looking for a full face cheap mask that will allow me to breath through my nose with a regulator connected,will this mask allow this? Thanks. Andy
Answer by caitlyn
on 3/31/2011
Yes, that is the idea of the mask for the full face to fill up with air
Question asked
on 11/22/2017
Does this full face mask have the same fogging problem as a traditional mask? Just out of curiosity, would I have to remove my mask if I had to use an alternate air source in emergency? Thanks
Answer by chris
on 11/24/2017
Hi, Thanks for your question. Most mask will fog up if you dont remove the silicon build up on the lenses and happens during manufacturing. You can clean the lenses with a little white toothpaste. A couple cleanings and it usually takes care of the problem. And yes you will have to remove the mask to use the Octo. For this reason, we highly recommend taking a fullface mask course with an instructor. If you have any other questions, please let us know. Thanks Divemaster Chris 866-728-2293