Oceanic

Oceanic Zeo / FDXi (DIN)

Oceanic's upper-tier reg, evolved from the well-regarded EOS and independently tested and praised for its breathing performance.

Environmentally sealed, cold-water rated

Sealed first stage keeps water and ice crystals out of the internal mechanism, the standard for diving below 50°F/10°C.

Oceanic Zeo / FDXi (DIN)
$744.95
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Released—
First stagediaphragm
BalancedYes
Environmentally sealedYes
Cold-water ratedYes
ConnectionDIN
Max pressure300 bar
HP / LP ports2 / 4
Adjustable 2nd stageYes
Weight800g
Nitrox-ready (EAN40)Yes
Octo includedNo

"HP / LP ports" is the number of high-pressure and low-pressure ports on the first stage, which caps how many accessories (transmitter, SPG, inflator, second second-stage) you can run at once.

Pros
  • Independently tested by Divernet, which called the breathing performance "exemplary" and specifically noted it coped well in cold water
  • Both a dive/pre-dive venturi switch and a diver-adjustable cracking-effort knob, more control than Oceanic's cheaper lines
  • Comparatively light for its performance tier, and called travel-friendly in independent review
Cons
  • Priciest of Oceanic's current regs, a real step up over the Delta 5
  • Divernet's reviewer noted it took real digging to confirm EN250A certification status, a documentation gap worth knowing about before buying
  • No octopus included in the base first-stage/second-stage set

The Zeo/FDXi is Oceanic’s upper-tier regulator, evolved from the well-regarded EOS and independently reviewed rather than just marketed on spec sheets. It’s aimed at divers who want performance and cold-water capability closer to boutique tech brands, without stepping up to Oceanic’s parent-company siblings like Aqualung’s LEG3ND.