"Khakis" is often used to refer to pants (that are khaki-colored, or made of the khaki textile). For example, Old Navy has a khakis page that lists various pants [1] and one specific to men's khakis [2].

In the context of the movie, khakis are another 'material good' that Tyler denounces, like cars, ikea furniture, etc.

[1] http://www.oldnavy.com/products/khakis.jsp

[2] http://www.oldnavy.com/products/mens-khaki-pants.jsp

"Khakis" is often used to refer to pants (that are khaki-colored, or made of the khaki textile). For example, Old Navy has a khakis page that lists various pants and one specific to men's khakis.

In the context of the movie, khakis are another 'material good' that Tyler denounces, like cars, ikea furniture, etc.