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Guardian Full Face Mask

(2 customer reviews)

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.


Recommended Add-Ons

Eyewear Kit for OTS Guardian FFM

Model#: 920033-000
Eyewear Kit. Add your prescription lenses to wire frames in your OTS Guardian FFM. With the Guardian Full-Face Mask Eyewear Insert, enjoy a clear view underwater with securely mounted, custom engineered and field-tested prescription ready eye gear.

GFFM 90 Degree Elbow

Model#: 137052-000

The addition of our 90 Degree Elbow allows you to re-route your low pressure hose for better trim and comfort. It can also reduce wear and tear on the 2nd stage regulator by putting less torque on the inner valve assembly.

OTS-ABV-2 Ambient Breathing Valve (Installed on GFFM Visor)

Model#: 920010-000
OTS-ABV-2 includes a GFFM visor with ABV® Valve installed

SW-S GFFM Swivel

This 360 degree swivel allows for a more comfortable dive as it allows your LP hose to move more freely!

It is also a great option if routing a LP hose under your arm.

SKU: N/A Category:
warning WARNING: This product can expose you to chemicals including Chromium which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


The Guardian line of Full-Face Masks (FFMs) is OTS’ most recent innovation. 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. The Guardian FFM comes in the following color combinations (skirt/hardware): black/black, black/blue, black/red, black/pink, blue/black, and yellow/black.


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 PowerCom 3000D
  • Includes OTS’ Ambient Breathing Valve®, Mask Bag, and LP hose


OTS Guardian User Manual (rev.F )

OTS Guardian Quick Start Guide

Installation of Ambient Breathing Valve (ABV) ->Guardian FFM (rev. E)

Equalizing Wire Size Card

GFFM Equalizer Wire Form Installation Instructions (rev. A)


2 reviews for Guardian Full Face Mask

  1. Keith Johnson

    Purchased a guardian FFM, this has been the best piece of equipment I have purchased yet. I’ve always had Mask leakage troubles with conventional face masks. After my training for my mask it’s the best thing ever no leaks due to the awesome 2 part seal. I also love that the mask requires no anti fog. I will be purchasing another one for my son and wife.

  2. Robert350554

    This is actually a safer option. You have communication to other divers and the surface. Should you suddenly go unconscious the mask is strapped to your face. Highly recommend. The only thing that is better is a Kirby Morgan dive helmet.

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