A demi cup bra has cups that only cover about half of the bust. They are cut low across the whole cup, as opposed to a plunge bra, which is only low in the center. It may have the look of a push-up from afar, but in actuality it is not as heavily lined as a normal push-up, giving you a more natural look. This style is very popular for designer lingerie and well-suited for lace details. Also, it is most likely that your everyday bra is a demi bra, like a good old t-shirt bra that is defined by its simplicity and practicality. T-shirt demi bras have a subtle and smooth shape, which doesn’t allow for bumps or lines under your tops.