Push-up breast forms are unique and different from other types of breast form products. The push-up breast form is NOT concave on back. It fills the bottom of the bra and pushes the breast up and out of the bra for more cleavage. It can work with any type of bra, but it works best with a push-up bra. The push-up bra is usually lower cut and allows the results of the push-up to show.
Other breast forms due not tend to push-up because there design and purpose is different. In many cases these forms are designed to cover the entire breast. The purpose of the full breast form is to add size and volume. Generally, full forms are worn with full coverage bras.
Push-up breast forms are hard to find, as many do not succeed at pushing up breast tissue for cleavage. Instead, push-up breast enhancers are the best way to add extra fullness!