6 best underwire nursing bras for large breasts that don’t cause clogged ducts

I would only recommend wired nursing bras to moms whose breast sizes have stop fluctuating. If you are experiencing any engorgement at all, wearing a flexi-wired bra would be agony. Wear wireless instead.

However, if breastfeeding is well-established and your boobs are behaving, flexi-wired nursing bras offer great support and help prevent breast sagging in the long run. Even then, never ever wear underwired bras to bed when breastfeeding (Read what to wear to bed when breastfeeding)

Flexi-wired bras also give your breasts a flattering shape (good bye uni-boob!) and are especially good for large breasts.

*The terms ‘underwire’ and ‘flexi-wire’ is used interchangeably. But all good quality nursing bras have flexi-wires instead of the rigid underwires of normal bras.

These are my favorite underwire (flexi-wire) nursing bras:

Best overall underwire nursing bra: Cake Maternity TimTams Nursing Bra


Check it out on Amazon

What I love about the Cake TimTams Bra

  • fit boobs up to 42J
  • specially designed for larger boobs with sizes up to 42J
  • excellent name 🙂
  • has 3-part soft padded cups to provide shape and lift.
  • made from flexible material that will expand with growing boobs
  • cotton-lined inner cups and slings to prevent any irritation to even the most sensitive breasts
  • OEKO-TEX certified to be free from harmful substances
  • you can buy matching briefs for it

What I don’t like about it

  • the horizontal seams on the cup are visible through tight tops
  • Side sling can be quite restrictive if your boobs sit laterally
  • on the pricier side

Who is it for?

Moms who are looking for a comfortable and non-toxic nursing bra

Sexiest underwire nursing bra: Elomi Molly Stretch Lace Underwire Nursing Bra

Check it out on Amazon

What I love about the Elomi Molly Lace Nursing Bra

  • caters up to a KK cup
  • has encapsulated full cups with side supports to lift and separate your boobs while preventing side and top spillage
  • the structured cups give your boobs a pretty rounded shape instead of  making them look pointy
  • sexy lace at tops of cups are stretchy so they comfortably expand with your boobs
  • moisture-wicking fabric to keep your boobs dry and non-sweaty
  • the full circle internal foam slings provide more support than the usual side slings when breastfeeding
  • the bra looks great in both black and blush
  • you can try it for free with Amazon Prime Wardrobe
Full circle internal foam sling – Pic courtesy of an Amazon reviewer

What I don’t like about it

  • on the pricier side, but good quality sexy nursing bras are hard to find
  • the lace can collect lint over time
  • there’s only one problem with moisture-wicking fabric – leaking milk gets wicked through as well! If you’re at risk of leaking, stick on disposable pads
  • You need to be careful when fiddling with the clasps so as not to damage the lace
  • the material could be thicker to give a bit more support

Who is it for?

Moms with very large boobs (fits up to KK cups) who are looking for a sexy supportive bra

Best t-shirt underwire nursing bra: Motherhood Maternity Full Coverage Nursing Bra

Check it out on Amazon

What I love about the Motherhood Maternity Full Coverage Bra

  • Full coverage cups provide good side support and prevent your boobs from falling out when you bend over
  • It’s structured shape separates your boobs and gives you a nice silhouette under tight tops
  • thick padded cups so your nipples don’t show through
  • very affordable good quality bra

What I don’t like about it

  • it’s not a bra you can wear with low cut tops
  • if the bra doesn’t fit just right, the underwire can poke in your ribs
  • the material isn’t flexible enough if your breast size fluctuates wildly. But if your breast size isn’t ‘stable’ yet, you shouldn’t be using underwired bras at all. Check out the most supportive wireless nursing bras for large breasts instead.

Who is it for?

Moms who want to have a smooth silhouette under tighter tops and t-shirts

Best cotton underwire nursing bra: HOTmilk Temptation Flexiwire Nursing Bra

Check it out on Amazon

What I love about the HOTmilk Temptation Bra

  • fits up to J cup
  • 100% cotton lined cups for extra softness and breathability
  • Full cup design to keep your boobs in the cup, even when bending over
  • U shape is convertible to racerback when you want extra support
  • the larger cup sizes come with wider straps to prevent them from digging in to your shoulders
  • It’s padded so your nipples won’t show through when you wear tight tops. Yeay!
  • the nursing bra in powder blush pictured above is a bit cheaper than the graphite and jet black bras but looks prettier 🙂
  • you can try it for free through Amazon Prime Wardrobe

What I don’t like about it

  • Has a side sling instead of an A frame. Side slings are less supportive when you’re breastfeeding.
  • the scalloping at the top of the lace fray over time
  • there is quite a bit of material in between the cups. If you have a large pregnancy bump, this part of the bra bunches up.

Best underwire nursing sports bra: Cake Maternity Zest Nursing Sports Bra

Check it out on Amazon

What I love about the Cake Zest Nursing Sports Bra

  • fits boobs up to 40K
  • it’s one of the few nursing sports bras around for high impact activities – which is any movement when you have large boobs
  • combination of flexi-wire and structured cups minimize boob bounce
  • Comes in so many fun colors
  • Molded cups that separate your breasts so you don’t sweat between them
  • Wide padded straps to disperse weight
  • Made of smooth spacer material to reduce friction and wick moisture away from body
  • Convertible to racerback for extra support
  • Oeko-Tex® Standard 100 Certified so you know your bra is free from harmful chemicals
  • Matching brief available – Zest Brief
  • Adjustable with 5 hook and eye options
  • you can try it for free with Amazon Prime Wardrobe

What I don’t like about it

  • Band sizes run small and cup sizes run big
  • Underwire can dig in if bra fit isn’t right
  • It’s on the pricier side

Who is it for?

Moms who are into higher impact activities like running. Or if you have a toddler.

Best budget underwire nursing bra: Gratlin Full Sling Support Nursing Bra

Check it out on Amazon

What I love about the Gratlin Full Sling Support Bra

  • caters for sizes up to 42G
  • it’s a fraction of the price compared to some nursing bras
  • there’s 11 colors to choose from
  •  the cups are only lightly lined so it can be folded easily for breastfeeding
  • encapsulated cups separate and lift boobs
  • mesh underbust band allows sweat to evaporate
  • 6 hook and eye options so you can adjust it with your changing body
  • A frame sling provide more support when nursing

What I don’t like about it

  • the cups are not too high, which is good for lower cut tops but your boobs are at risk of popping out when you bend down
  • the synthetic fabric isn’t comfortable, especially if you have sensitive skin

Who is it for?

Moms who don’t have sensitive skin and are looking for a budget underwire nursing bra option

What is the difference between flexi-wired nursing bras and regular underwired bras?

Other than the nursing features like drop-down cups and A slings, nursing bras are made of softer, more flexible material to accommodate boob and ribcage size changes. The flexi-wire in nursing bras are more flexible and are in a bigger moon shape compared to normal underwires.

What is Amazon Prime Wardrobe?

It’s part of Amazon prime  to choose up to 8 items to try in the comfort of your own home. You get up to 7 days to try them and will only be charged for the ones you keep. Your items come in a resealable box and prepaid return label for easy, free returns. Many (I wish it was all) nursing bras are part of this service which is great because sometimes it can be hard to get the sizing right.

Start your 30-day free trial here.

How to buy underwire nursing bras for large breasts

  • Measure yourself or go to a store to get measured. This is especially important because if your bra doesn’t fit properly, the wires will dig in and cause clogged ducts.
  • Choose flexi-wired nursing bras – these are nursing bras with a more flexible underwire in a larger moon shape.
  • If it is an option, choose from the ‘busty range’ as these nursing bras are designed specifically for moms with larger boobs.
  • Check out the size guide. Unfortunately all brands and even the various nursing bra styles have different size definitions.
  • Make sure you buy from a company that has a good return / exchange policy.

Features to look out for in underwired nursing bras

  • Strong and flexible material
  • Breathable fabric – the last thing you need is boob sweat.
  • Thick straps disperse weight and don’t dig into your shoulders.
  • A thick underbust band to help support your boos. It should sit parallel to the floor. Even when you lift your arms up, it should never ride onto your breasts. If it does, the band is too big.
  • Good side coverage / wing support with ensure no side boobs.
  • Full cups so there is no spillage or bulging at the top and sides. Even when you lean forward, your bust should not fall out of the cups.
  • Encapsulating cups to lift and separate. Squished boobs are very uncomfortable.
  • Easy access for breastfeeding – check that the clips are not fiddly and can be done up with one hand.
  • Adjustable straps and band – because if your bra doesn’t fit just right, the underwire can dig into your ribs/ breasts.
  • Preferably ‘A’ frame sling rather than side sling for better support during breastfeeding.

To wrap up

The Cake Maternity TimTams Nursing Bra is the best underwired bra because it ticks all the boxes – comfortable, supportive, and certified to be toxin-free. However, if you’re on a budget, the Gratlin Full Sling Nursing Bra is great value-for-money and is one of the more popular nursing bras on Amazon.

If you went around in sports bras every day, there is no reason why you can’t wear the Zest Nursing Sports Bra throughout the day when breastfeeding. It has awesome support, especially if you are running after toddlers.

No matter which underwired nursing bra you choose, just make sure it fits perfectly so that it doesn’t result in clogged ducts.

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