the exolung gives divers an 'unlimited' underwater air supply

the exolung gives divers an 'unlimited' underwater air supply

exolung, an underwater breathing device has been designed to give divers an ‘unlimited’ air supply. it translates the diver’s swimming motions into air movement, keeping breathing air flowing as long as the diver keeps swimming.

the exolung gives divers an 'unlimited' underwater air supply

images courtesy of exolung



exolung is a surface-supplied diving system, which means it uses a buoy that floats on the surface of the water to provide the diver with air. doubling as a safety restraint, a hose measuring 39 feet (12 meters) connects the buoy with the water bell worn on the front of the torso.

the exolung gives divers an 'unlimited' underwater air supply



inside the bell’s hardshell body, there is a collapsible water bladder attached to leg straps that secure around the diver’s feet. by extending the legs, fresh air is drawn down from the surface and water is displaced from the air bell. when the diver retracts their legs, water pressure puts air inside the bell under ambient water pressure, which can then be inhaled.

the exolung gives divers an 'unlimited' underwater air supply



the device makes the diver the power source, creating an ‘endless’ air supply as long as the diver doesn’t stop swimming. unlike tank-based systems, the exolung doesn’t involve the additional cost of refilling and is very easy to maintain. like a snorkel, it just needs to be cleaned after use.

the exolung gives divers an 'unlimited' underwater air supply



exolung’s designer jörg tragatschnig is looking for commercial partners to bring his idea to market. currently patent-pending and in the prototype phase, tragatschnig estimates a price of less than €300 (approximately $335USD) for the basic version described above. he has also developed a ‘pro’ model with a 23-foot (7 meters) hose and reinforced construction that would retail under €500 ($550USD).



project info


designer: jörg tragatschnig
product: exolung
price: approx. €300 (approximately $335USD) – €500 ($550USD)
status: prototype

  • If this works, it is simply a wonderful piece of invention. So many uses across a wide spectrum.
    Well done

    Johnb says:
  • This is a death trap in every sense, don’t stop swimming or the air will stop, effort becomes greater at depth with pressure, if there is an issue with air will the user get CO2 poisoning because of exhaled air in the breathing loop. These things are born out of projects with no subject matter experts involved, any diver would point out a plethora of issues with this toy and potential for serious injury or death

    Micky Mc says:
  • Every breath is exhausted so I don’t see a carbon dioxide problem unless the mask is badly designed always use a nose clip. Fatigue is a problem in constant swimming. If the frog kick is used then this problem will disappear I would not use this system for a long dive unless I could use the frog kick. The same rules of diving apply but no buddy diving without redundancy and buddy diving where is the air breathing for your buddies assistance with his faulty rental regulator?

    Michael Boucher says:
  • Every diver wants to be able to stop and look around or at something he sees or clear a mask . Then what no air??? I guess you could swim around in circles to look at it. And yes too much time at depth and get Benz as far as I remember. Why not just add small battery air pump for when you want to stop for a minute. ????

    Boobie says:
  • Your comment is completely irrelevant unless you can cite any credible sources

    Micky mc 2 says:
  • Guys. It’s a prototype. It’s an early iteration. It will change and evolve and improve. The inventor is looking for commercial partners who have more resources to stress any potential issues and improve it. Man people are so harsh, probably because they don’t realize how hard it is to invent a product and bring it to market…

    Yasin says:
  • Micky – I see exchanged air being blown directly into the sea, not up the tube. With only a 39 foot hose, the user is only going to be able to go to about 30 feet. We’re talking snorkeling depth here, not diving depth. If the user stops moving and the air flow is stopped, the diver will be forced to surface or move to get air to breath. Yes, there has to be a certain amount of safety engineering that goes into this but I see your response as an over reaction.

    Ed Boyd says:
  • Yes, they could add a small pump with battery that is turned on and off by the diver. That way when the stop to look at something they could just turn on the pump, and when they are swimming again turn it off.

    Miles says:
  • LMAO! This video is so pretty & the background score of music goes so well with this…. thing-ah-majig!
    It looks cool, but Im not sold at all. I forsee major problems and life threatening injurys.
    Perhaps im too old school or arcane in my thinking, but i really do thrive on the romance of my equipment, the heavy tank, the bulkey B.C.D., the regulators. Thats the real “cool factor” for me that got me into scuba diving 20 years ago! I think i’ll keep my gear, then i can stop when i want and smell the….. Well, you catch my drift (dive)! Lol

    Divemaster Bondo says:
  • I agree with the above, however what struck me first was that the diver had, what in essence, a fully inflated BC on their chest. What kind of weight belt must you need to use it?

    Ciberdiver says:
  • This is not a good idea .. Too much risk to an inexperienced encourages untrained swimmers to attempt diving at depth without an understanding of the problems diving at depth can create.

    Jim Arneson says:
  • Only problem I see are the super novice who couldn’t come up from 39’ on one exhaled breath if there was an issue, ie with bladder, or umbilical to surface gets caught up or boat rips out floatation to bits. But yes some die for the greater good of safety.

    Damon T. says:
  • It doesn’t make sense. During the dive you want to see a lot of things and sometimes you need or must stop. Other limit is visit caves, wracks ect. Probably better form intro dive nothing more.

    Kaam says:
  • This looks like it would be most fubctional in calm waters to a 3 meter (10 foot) depth. Making for shallow dives that can be done around recreational snorkeling depths easier. It may be better suited to tourism in parts of the bahamas and florida keys than deeper locations visited by scuba divers. Another aspect would be 6 Pack boats were dislodging shallow anchoring with stuck anchors might occur.

    Quinn says:
  • I don’t see how this will tackle bouyancy control issues under water and to resurface

    MattD says:
  • Batteries can’t be exposed to the air chamber in any way.

    Carroll Cool says:
  • Did anyone pay attention? Max depth on the pro is only 23 feet. So therefore your only in the first atmosphere. Hence no issues. Just sayin

    Joe Diver says:
  • A host of problems first need to be sorted out here – as other experienced divers have mentioned. Big NOPE from me, thank you.

    Mark Fuller says:
  • Hi mates,
    this is not new. Something like that comes onto the market every few years.
    I think the oldest was in Germany in the 1950s. I think it is not patentable.
    It is life-threatening for inexperienced people.

    RugbyWinne says:
  • Actually it is not a world premiere. Probably was 1995 when I saw a quite similar invention, but probably was a better product overall.
    If I remember properly, the max depth was limited to 6 m (definitely safer) and was possible to breath even stopping the kick cycle.
    Obviously (and luckily I would say) it’a been a project that has never had a commercial following!
    To dangerous for inexperienced swimmer or divers, and ridiculous for who has good understanding of underwater activities such a good skin diver (can easily go deeper) or a diver!

    Stefano Mitta says:

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