Emergency oxygen masks are devices designed to provide supplemental oxygen to individuals in situations where the air supply is compromised, such as during an aircraft emergency. These masks are typically stored in overhead compartments and automatically deploy when needed. They are equipped with a flexible tube that connects to an oxygen supply, ensuring that users can breathe easily until they reach a safe environment. When using an emergency oxygen mask, it is important to secure the mask over the nose and mouth and breathe normally. The masks are designed to fit a variety of face shapes and sizes, making them suitable for both adults and children. In an emergency, passengers are instructed to put on their own masks before assisting others, ensuring that everyone receives the necessary oxygen.