What to use to suck in everything after baby is born?


I'm currently almost 7 months pregnant with my 2nd baby. I know I'm gonna need lots of help sucking in all this postpartum baby belly after lol. I used this maternity belt last time but it was so bulky and you could see it under my clothes or through it which was annoying. I'm looking for something thin and light weight so it doesn't show through my clothes but still sucking it all in. Thanks :)