A high temperature hose sleeve is a protective covering that is designed to shield hoses and cables from extreme heat. It is typically made of materials that can withstand high temperatures, such as fiberglass, silicone, or ceramic fiber. 

The sleeve is designed to fit over the hose or cable and provide a barrier between the heat source and the hose or cable. This helps to prevent damage to the hose or cable and can also help to prevent fires or other safety hazards. 

High temperature hose sleeves are commonly used in industrial settings where high temperatures are present, such as in foundries, steel mills, and glass manufacturing plants. They are also used in automotive and aerospace applications to protect hoses and cables from the heat generated by engines and other equipment.