Oceanic Zeo + FDXi RegulatorZeo + FDXi Regulator The pneumatically balanced ZEO is an engineering marvel of precision, durability and comfort. Its durable chrome plated marine brass metal valve delivers a phenomenal breathing experience, improves cold water performance and helps recirculate moisture from exhalation to prevent dry mouth. The breathing adjustment gives the diver a wide range of control to precisely set airflow throughout the dive. The ZEO comes standard with an in