Tonneau
![1910 Buickside-entrance tonneau without tonneau cover](/Images/godic/202502/16/1910_Buick_Tonneau_rear4316.jpg")
![1905 Cadillac Model Crear-entrance tonneau with tonneau cover](/Images/godic/202502/16/Cadillac_Model_C_Tonneau_19054316.jpg")
![1903 Sunbeam rear-entrance tonneau](/Images/godic/202502/16/Sunbeam_1903_Heck4317.JPG")
![Tonneau Cover](/Images/godic/202502/16/MGA_DSC_44804317.JPG")
Tonneau cover (US /tʌˈnoʊ/ or UK /ˈtɒnoʊ/) describes a hard or soft cover used to protect unoccupied passenger seats in a convertible or roadster, or the cargo bed in a pickup truck. Hard tonneau covers open by a hinging or folding mechanism while soft covers open by rolling up.