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Spotted: The ExoLung, a new prototype from Austria, allows divers to breathe underwater indefinitely. The diver’s swimming motions pull dry air from the surface, keeping breathing air flowing as long as the diver keeps swimming.

Unlike Scuba equipment, which uses compressed air, the ExoLung draws air from the surface through a hose. The hose is connected to a buoy, which keeps it above the water, and the other end of the hose connects to an air bell worn by the diver. Inside the hard shell of the air bell is a collapsible water bladder, attached to straps on the diver’s feet. 

As the diver extends their legs, the straps pull the bladder, drawing fresh air from the surface and displacing water from the air bell. When the diver pulls back their legs, the straps relax and water pressure pulls in air, which can then be inhaled normally. 

The entire ExoLung system weighs less than 8 pounds (3.5 kg) and packs down into a portable cube measuring just 16 x 12 x 8-in (40 x 30 x 20-cm), making it much more portable than scuba equipment. Unlike scuba diving too, the ExoLung does not require any certification, which could broaden its appeal to those who are looking to time underwater, but who are not interested in the expense and dangers of deep-diving.

At Springwise, we have seen a growing number of innovations in the sport and recreation space. From a folding kayak to holographic display for swim goggles, designers are increasingly bringing technology outdoors.