The term 'Pullman Berth' refers to a type of sleeping accommodation on a train. It consists of two parts, a LOWER berth and an UPPER berth. The LOWER berth is a bed located at the bottom of the compartment, while the UPPER berth is a bed located above the LOWER berth. Both berths are usually made of wood and have a mattress, pillow, and sheets. They provide a comfortable and private sleeping space for passengers on long-distance train journeys.