Spanx has become synonymous with shapewear, but its bras are the company's hidden gems - here's why we love them

Available in four colors and band sizes 32-38 and cup sizes A-DD.

Spanx’s expertise at making shapewear that no one can tell you’re wearing extends to its bras. My Spanx bra had a unique feeling of being a lot more tight and secure than it looked — my skin didn’t squeeze out and my bra outline didn’t show through my shirt.

The style is also pretty yet simple. I usually shy away from lacy numbers since they tend to be itchy and irritating, so I was surprised and impressed when I put this one on and felt ... nothing. It’s the kind of bra that you put on in the morning and pretty much forget about until you have to take it off later. — Connie Chen, Insider Picks reporter

Available in five colors and sizes XS-XL.

I think I might be in love with this bra. I’ve never felt so much comfort and support at the same time from a sports bra. Spanx advertises that the Workout-to-Waves sports bra is designed with “Back-smoothing and dig-free construction,” and that’s not a lie. It’s so flattering across your back with its criss-cross elastic, and the front holds a nice shape as well — no matter how much you move around. I wore it while I ran, rode a bike, and slammed sandbags on the gym floor. The bra was perfect for all of my exercise needs, and can even be worn to swim in.

I felt so comfortable in this bra that I started wearing it when I wasn’t even planning on working out. The straps are built like your average bra (that is to say they're adjustable), and the cups hold a nice supportive shape, so it’s impossible to tell that this bra isn’t your standard underwire pushup (which, come on, we all know are super uncomfortable). I’m a C cup so I don’t need a ton of support, but I definitely need a decent amount. I would honestly market this bra as the only bra you’ll ever need. — Francesca Rea, Insider Picks content producer

Available in four colors and band sizes 32-38 and cup sizes A-DD.

This bra combines one of the softest and most comfortable materials I've ever felt with the support of Spanx shapewear. Understandably, this makes it one of my favorite bras to date.

As my colleagues have mentioned, Spanx straps are comparatively wide and dig-free. 3D technology and an invisible side sling combine natural lift, support, and shape, and the smooth material in the back does away with any lines under T-shirts. I can throw it on in the morning and will still opt to lounge around my home in it eight hours later.

The only thing I would note is that while I typically wear a 32DD, I would have gone up to a 32DDD if possible in this bra. The band is perfect, but I've noticed some spilling over the cups. It should give you some idea of how comfortable the bra is though since I wear it anyway. — Mara Leighton, Insider Picks reporter

Available in two colors and band sizes 32-38 and cup sizes A, B, and C.

I wear a 34A, so the support factor of a bra has never been a huge deal for me. Instead, I judge a bra based strictly on comfort. The Spanx Bra-llelujah Demi Lift definitely provided the comfort I was looking for and fit better than almost any other bra I’ve worn. The straps are about two times as wide as average which helps it stay in place all day, and the front closure is a nice, easy addition.

The only issue I faced was that I started to feel the underwire about halfway through the day. This was slightly uncomfortable, but I was so pleased with the material that I would absolutely order another bra from Spanx, just without an underwire. Luckily, the site makes it easy to filter bras by preference. — Megan Foster, Insider Picks intern

Available in two colors and sizes XS-XL.

My criteria for workout apparel is pretty simple. I just want something comfortable and supportive enough that it doesn’t intrude on my workout — looking nice is an added bonus. This isn’t the cutest sports bra I’ve ever put on, but it’s definitely at the top of the list for comfort. The fabric is super soft and stretchy but still supportive enough for high-intensity interval workouts. The seamless design and strappy back on this bra actually hold your natural shape, so I could see myself wearing this in place of a regular underwire bra outside of the gym, too. — Remi Rosmarin, Insider Picks reporter