Why We Leak: Understanding Breast Milk Leaks (and Why Marbra’s Leakproof Nursing Bras Are the Best Solution)

Leaking breast milk is one of those surprises that come with new motherhood.

You’re feeding your baby, out for a walk, or even just thinking about your little one — and suddenly, your shirt feels damp.

It’s completely normal, but it can be frustrating. The good news? With the right nursing bra, leaks don’t have to disrupt your day.

Here’s why leaking happens — and how Marbra’s leakproof nursing bras are changing the game for mums everywhere.

Why Do Breasts Leak During Breastfeeding?

Leaking breast milk is your body’s way of adjusting to your baby’s needs. It’s common, especially in the first few months of breastfeeding.

Here are the main reasons why you might experience leaks:

1. The Letdown Reflex

When your baby feeds — or even when you hear them cry — your brain releases oxytocin, which triggers the letdown reflex.

That reflex causes milk to flow, sometimes from both breasts at once. Even if your baby isn’t actively feeding, your body can respond instinctively.

2. Oversupply

In the early weeks, many mums produce more milk than their baby needs. Until your supply regulates, your breasts may feel full and leak unexpectedly — especially between feeds.

3. Full Breasts or Missed Feeds

If you go a little longer than usual between feeds or pumping sessions, your breasts can become engorged, leading to spontaneous leaks.

4. Nighttime Leaks

While you finally get a few hours of sleep (well-earned!), your body keeps producing milk — and gravity takes care of the rest.

Leaking is completely normal, but it can be inconvenient and uncomfortable. That’s where leakproof nursing bras make a huge difference.

The Problem with Regular Nursing Bras

Most traditional nursing bras weren’t designed with leaking in mind.

They rely on disposable nursing pads that shift, bunch up, and need constant changing.

Worse, thin fabrics and underwires can make things even more uncomfortable for already sensitive skin and breasts.

Regular bras may make feeding easier, but they don’t protect you from leaks.

That’s why Marbra was born — to make motherhood a little drier, softer, and simpler.

Why Marbra Leakproof Nursing Bras Are Different

At Marbra, we set out to create the best leakproof nursing bra — one that feels as good as it performs.

Every detail was designed by mums, for mums.

Here’s what makes Marbra stand out:

Triple-Layer Leakproof Technology

Our 3-layer leakproof fabric absorbs leaks fast, locks in moisture, and keeps you dry all day (and night). No disposable pads needed.

Wire-Free Comfort & Support

Breastfeeding bodies deserve comfort — not restriction. Marbra’s wire-free structure provides gentle support that adapts to your shape without digging in.

Soft, Breathable Materials

Made with buttery-soft, stretchy fabric that moves with you through pregnancy, postpartum, and beyond. No irritation, no stiffness — just all-day ease.

Minimal, Modern Design

Beautifully simple. No frills, no fuss — just a sleek, minimalist design that makes you feel confident and comfortable, every day.

Comfort That Empowers Confidence

Leaking is part of your body’s incredible ability to nourish life. But it shouldn’t leave you feeling anxious, uncomfortable, or constantly changing clothes.

With Marbra’s leakproof nursing bras, you can nurse, pump, and move freely — knowing you’re protected, supported, and dry.

Because motherhood may be messy, but your comfort shouldn’t be.

Shop the Best Leakproof Nursing Bras by Marbra

Marbra makes leakproof nursing bras that blend comfort, performance, and confidence — designed by mums who’ve been there.

No leaks. No stress. No compromise.

👉 Explore Marbra’s Leakproof Nursing Bra Collection