Try telling any engineer that a design, any design, can't be improved... made better. In our case, this challenge led directly to the ZEO.

We started with the EOS, a legendary regulator known for its comfort and excellent breathing performance, and ended up with the ZEO. Like its predecessor, the EOS, the ZEO is also a phenomenal regulator that gives the diver wide control over the airflow profile at any depth. This design, however, goes a step further by using a durable and corrosion-resistant chrome-plated brass valve, which has better cold-water performance and even better breathing characteristics. The all-metal valve aids in the condensation of water vapor from your exhale. During inhalation, the condensed water vapor circulates with the airflow and helps recirculate moisture from the exhale to reduce dry mouth and increase overall comfort during the dive. The ZEO is equipped with our patented dynamic adjustment technology, diver-adjustable inhalation effort control, a dive/pre-dive switch, a super comfortable orthodontic mouthpiece, and a swivel joint on the hose.