A laryngeal mask is a medical device used to maintain an open airway during anesthesia or emergencies. It consists of a soft, inflatable cuff that fits snugly around the larynx, allowing for ventilation without the need for intubation. This device is often used in surgeries or situations where traditional breathing tubes may be difficult to place. Laryngeal masks are designed to be easy to insert and can be used in both adults and children. They provide a secure airway and are less invasive than endotracheal tubes, making them a popular choice among anesthesiologists and emergency medical personnel.