Sleep bra without pinching: what to look for

An underwire bra has no business in bed. A sports bra seems like the obvious backup, but for most women it's too tight to lie in for eight hours straight. What actually works: a soft, wire-free bra with no hard closure and no band that digs in.

Why does your bra dig in more once you lie down?

Your bra sits differently during the day than when you're lying on your side or back. Standing up, the underwire falls right under your breast and you barely notice it. The moment you lie down, your breast tissue shifts with gravity, and that same wire edge suddenly presses into your ribs or breastbone. The band creeps up toward your armpits, and the closure on your back, the one you never notice during the day, now digs straight into your skin and the mattress.

Try this: lie down on your back wearing the bra you have on right now. Put your hand flat under your lower back, right at the closure. Can you feel the hooks pressing clearly into your skin? That's exactly why you take it off before you fall asleep.

Digs in and not fun to sleep in.

Of the almost 2,900 women we asked, 32.8% name the underwire as their biggest complaint, and another 23.3% say their bra pokes, presses or cuts in. During the day you sometimes get used to that. Lying down, you don't: your body relaxes, and that's exactly when you feel every hard edge twice as sharp. Want to know exactly what goes wrong when a bra doesn't feel right in bed? Read Bra Not Comfortable to Sleep In? Here's What to Do.

Might you be just as well off sleeping with no bra at all?

For a lot of women, that's simply the best option. No band, no closure, no underwire: there's nothing left to dig in. If you're a smaller cup size, you probably won't notice much difference at night whether you're wearing one or not.

With a fuller cup, it's different. Without any support at all, your breasts slide sideways toward your armpits, or press against each other all night. That doesn't hurt, but it doesn't feel good either, and in the morning you might wake up with a stiff neck or shoulders, because you spent the whole night shifting position to avoid it.

Try this: lie down the way you normally sleep, with no bra on. Roll onto your side. Do you feel your breasts sliding toward your armpit, or pressing against each other? Then you probably want a little bit of light support, even at night.

So is a sports bra the answer?

A sports bra seems like the logical choice: no underwire, snug, no straps sliding off. But a sports bra is built to keep your breasts still during movement, not to relax in for eight hours. Several customers told us they really only saw two options: an underwire bra, or a sports bra. If you can't stand an underwire, that feels like a thin choice, and a sports bra isn't exactly ideal for nighttime either.

A sports bra isn't a good choice for sleeping if you notice it squeezing your ribcage, or if you wake up with red lines on your skin from the wide elastic bands. During the day and while working out, that compression is exactly the point. For nighttime, it's simply too much.

Try this: put on your sports bra and lie down the way you sleep. Take a slow, deep breath. Does your ribcage feel boxed in, or do you have to breathe harder to get a full breath? Then that bra was made for the gym, not your bed.

Is a push-up bra or a lace bra an option for nighttime?

The Jelly Push-up Bra and the Lace Lift Bra are both wire-free, which might make them look like an option at first glance. Still, neither was made with sleep in mind. The jelly strips in the Jelly Push-up are there to add shape and lift under clothes during the day. Lying down, you don't need that lift, and those strips just feel like extra material against your skin.

The Lace Lift Bra, meanwhile, is built for women who wear their bra for 12 hours or more a day, with lace and a push-up shape. Great under a dress during the day, but not the first choice for nighttime: the padding and lace don't add anything when no one's seeing it anyway.

For bed, go with the style that has the fewest extras: no padding, no lace, no strips. Just soft fabric that moves with you.

So what should a bra for sleeping actually have?

• No underwire: no hard edge pressing into your ribs the moment you lie down.
• A wide, soft band: the wider the band, the less pressure per inch of skin.
• A closure that doesn't dig into your back: flat-finished, or no hard hooks at all.
• Seamless fabric: no lines pressing into your skin while you lie on your side.
• Breathable fabric: your body temperature drops at night, but your bra shouldn't start sticking or feel itchy.

The Daily Essential Bra is built for daytime, but a lot of those same features work just as well at night. No underwire, so no pressure point on your ribs. A band a little over three inches wide that spreads the weight of your breasts out instead of concentrating it on one line of skin. The memory foam cups shape themselves to your body instead of holding a fixed shape, so they don't push back when you roll onto your side. And the fabric is fully seamless, so there are no edges left printed on your skin by morning.

Try this: run your finger along every seam on your bra, all the way around. Do you feel a hard edge or double stitching anywhere? That's exactly where you'll find a mark on your skin come morning.

Not sure if this style will work for you in bed? You get a 30-day perfect fit guarantee to just try it out for yourself first.

What size should you wear at night?

At night, you don't always want the same size you wear during the day. Some customers deliberately order one size up for bed, because the band won't ride up and the cups won't flatten your breasts as much. Say you wear a 36B during the day and the band already feels tight by the end of the evening? A 38B is often more comfortable for nighttime, even though you wear the smaller size all day.

Try this: put on your current bra and slide two fingers under the band at your back. Do more than two fingers fit under easily? Then the band is too loose, and it will ride up at night. Can't fit a finger under it at all? Then one size up for nighttime is usually more comfortable than your daytime size.

When is a bra for sleeping not the right call?

Do you have larger, heavier breasts and notice stiff shoulders or a stiff back, even with the softest wire-free bra you can find? Then even that style doesn't always give you enough support. Take a look at Bra Feels Heavy? Here's How to Lighten the Load for Larger Breasts.

Would you rather wear nothing at all in bed, and that feels fine to you? Then there's no need to talk yourself into anything else. Comfort is the only thing that matters at night, not habit or what you wear during the day. Want to look around anyway? You'll find the full lineup in our wire-free bra collection.