To answer a question we need a who, what, when, where, why, or how. Your question lacks a where and when.
clothing
no
The same clothes as everyone else of their class.
middle class whites-apex
Modern, middle-class city dwellers dress in Western-style clothes.Chile's huasos or cowboys wear the poncho.
The capitalist class
There is rich, middle class, and poor. I, myself, am middle class.
low class, middle class, upper class/high class
It depends upon the school's policies, but it seems unlikely that any middle school would permit a bikini.
Middle class
Middle class to upper middle class .
The middle class