This sleeper roof window curtain is designed as an OEM replacement interior component for select Western Star 5700XE trucks, helping maintain privacy and light control in the sleeper cab area. Built as a direct-fit part, it is intended for installation on the driver or passenger side roof vent window depending on configuration, restoring the original function and appearance of the factory curtain system. The black vinyl construction is designed for durability in daily heavy-duty use while providing a consistent interior finish that matches OEM specifications. Each curtain is sold individually and is made to replace specific original equipment part numbers, ensuring proper alignment and fit within the existing window track system. It is intended for use in maintenance or repair situations where the original curtain is worn, damaged, or no longer functioning as intended. Because fitment is model-specific, confirming compatibility with the correct side and truck year range is recommended before installation.