I know this is a shitpost, but real answer: A t-shirt bra is a specific style of bra intended to be worn under t-shirts. They’re supposed to have softer seamlines and less bulk, so they’re not so obvious under thin fabric, but some women just find them more comfortable.

T-shirt bra. It’s a style of bra. There’s all different kinds. T-shirt, push up, plunge, strapless, etc. One for every occasion.

Edit: There’s also wire-free regular lining, wire-free push up and unlined. There’s front closures and back closures. Different styles of bras have different kinds of support for all shapes and sizes of breasts.

Even the clothing stores are trying to make you trans now!

• Some regressionist, probably

For front butt support.