Cotton tees might be the simplest of tops to wear in the summer, but it's not as easy as it might seem to dress yourself underneath without fear of odd bulges, awkward textures, and the like. This is a job for the aptly named t-shirt bra, made of a supersmooth material, perfect rise in cup height and shape, and often a more skin-toned hue that won't be easily seen through a bright white tee.