The Non-Rebreathing Mask (Vertex) Size Adult is designed to deliver high concentrations of oxygen to adult patients who need supplemental oxygen. It features a one-way valve system that prevents exhaled air from re-entering the mask, ensuring that the patient receives a higher oxygen concentration. The mask comes with a reservoir bag that provides a steady supply of oxygen, making it ideal for use in emergency situations or for patients with respiratory distress. The mask is a single-use, disposable item, ensuring hygiene and reducing the risk of cross-contamination during treatment. It is commonly used in healthcare settings like hospitals and clinics.