Many women swear by using belly bands after they have delivered their child. They tend to wear them not only directly after birth, but also in the weeks and even months after birth because of the support that these bands can give. For more info
Shapewear can help your tummy look good for an evening, but a postpartum recovery garment will help bring your abdominal muscles back together and avoid persistent diastasis recti (abdominal muscle separation
A postpartum wrap or band can be used to help support your abdominal muscles directly in the first few weeks after you give birth, when those muscles are at their weakest. They can also provide light compression to help your uterus shrink back, although that will happen naturally anyway