multiwall
adjective
mul·ti·wall ˌməl-tē-ˈwȯl 
-ˌtī-
: having a wall composed of multiple layers
multiwall nanotubes
It also offers specialty paper products … such as multiwall paper used to produce bags for agricultural products, pet food, baking products, cement and chemicals …
Anthony Miller
Anthony Miller
Word History
First Known Use
1926, in the meaning defined above