The company's main product is the Zephyr Endobronchial Valve system, which is designed to block air from passing through a lung opening and into the chest cavity, allowing the tissue to heal by reducing or eliminating airflow through the leak. The valve redirects inhaled air to healthier parts of the lung, providing a targeted treatment option for emphysema patients. Founded in 2000 and based in Redwood City, California, Emphasys Medical aims to make it easier for doctors to treat COPD and improve the lives of patients with breathing disorders.