OTS Spectrum Full-Face Mask

The Spectrum Full Face Mask provides a simple method to adapt your own regulator to the mask by eliminating the bite down mouthpiece and tying your own reg in with the rest of the FFM.


  • OTS Spectrum Full-Face Mask is tested to a maximum diving depth of 50m according to EN 250:2014**
  • OTS Spectrum Full-Face Mask is designed for water temperatures below 10C and is suitable for cold-water diving applications. Ultimately, cold water performance is dictated by 2nd stage regulator being used.
  • OTS Spectrum Full-Face Mask is tested for diving applications with breathing air according to EN12021.
  • OTS Spectrum Full-Face Mask has been tested according to the European standard EN 250:2014**

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Guardian Full Face Mask

Designed to meet the demanding needs of today’s Commercial/Professional Diver, it leverages the best features found on other FFMs with unique features designed by OTS.


Features of the Guardian FFM include:

  • Removable 2nd stage for easy cleaning and storage (can’t be used w/o mask)
  • Made of a one-piece, non-rigid silicone skirt combined with injection-molded, high-impact, glass-filled ABS plastic frame and regulator housing
  • A double face seal and slightly smaller oral nasal cavity to fit most faces
  • Equalization occurs through a nose block.
  • Air flow is directed up over the visor to eliminate fogging and through one-way valves in the oral nasal pocket to reduce CO2 retention.
  • 2nd stage comes off the right shoulder and uses a standard LP hose
  • Includes a communications port for easy installation of a Buddy Phone or ear/microphone assembly to connect an OTS Diver Communications Unit such as the Aquacom SSB-2010
  • Includes OTS’ Ambient Breathing Valve, Mask Bag, and LP hose

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OTS Full Face Mask Side-By-Side Comparison


Spectrum FFM Guardian FFM
Double Seal Skirt Yes Yes
Self-Defogging Mask No Yes
Quick Disconnect 2nd Stage No Yes
Ambient Breathing Valve Yes, As Additional Accessory Yes
5 Point Head Harness Yes Yes
Compatible With Communications Yes Yes
Available in Multiple Colors Yes Yes
Venturi Assisted Regulator N/A No
Included Low Pressure Hose No Yes – Standard Hose
Included Mask Bag No Yes
Online Techician Course Available No Yes
Warranty 1 Year 2 Years
Included First Year Maintenance No No