What is an unlined hose characterized by?

An unlined hose is characterized by a woven jacket made of linen yarns. This design contributes to the hose's flexibility and allows it to be lightweight while still maintaining sufficient strength for water flow. The use of linen yarns in the woven jacket provides durability and resistance to abrasions, making it suitable for certain firefighting applications where maneuverability and structural integrity are required. The absence of a liner helps the hose be more compact and less prone to damage from sharp objects, which can be an advantage in dynamic firefighting environments.

The other material descriptions, such as rubber, steel, or heavy-duty plastic, do not accurately represent the construction or intended use of an unlined hose, which relies on the woven fabric to fulfill its operational role effectively.