All Covertogs tops have built-in soft cups that provide enough breast support for most women. However, if you feel like you need additional support, I recommend you have a look at the Elomi brand.  Here is a link to their website: 

https://www.classicshapewear.com/p/elomi-essentials-underwire-plunge-swim-bikini-top-es7504 

I would love to hear from you if you have tried Elomi or any other bra top underneath their top.