Keep Cool™ Sleep Breathable Maternity & Nursing Bra

Medela’s Keep Cool™ Sleep Bra features a full racerback breathing zone for fresher, cooler nights and comfortable, rejuvenating sleep. New quick dry technology helps to balance your body temperature while offering you support and comfort. 

Our 4-way Adaptive  Stretch™ technology will see your bra grow with you and extend from pregnancy through nursing – keeping you cool and dry throughout your journey despite your fluctuating body temperature and keeping you supported and comfortable while you sleep. 


Calculate My Size

Inches CM

On bust measurement:

84 92 100 107 114 121 128 136

Under bust measurement:

70 75 80 86 91 96 102 106 112

Your recommended size is

Keep Cool Bras: M

Hands-free™ Pumping Bustier: S

Product Details
Benefits and features
Fabrics & Care Instructions

The Medela Keep Cool™ Sleep Breathable Maternity & Nursing Bra will help keep you feeling cool and fresh while giving you gentle support throughout your pregnancy and nursing journey. 

  • No hooks and a breathing zone between the shoulder blades for extra comfort while you sleep 

  • Crossover for easy feeding  

  • Quick dry technology, unique breathing zones and temperature control to help keep you cool and dry 

  • Soft touch Adaptive Stretch™ technology for a perfect fit that grows with your changing body 

  • Gentle support to keep you feeling comfortable  

  • Available in black, chai or white*and in sizes S - L for great support and a perfect fit 

  *colours available may vary and are subject to change 


This wireless & seamless racerback Sleep Bra is soft to the skin and provides a lightweight feel to one of the most sensitive parts of your body. 

It also uses unique breathing zones, quick dry technology and temperature control to help keep you cool and dry, while the soft touch Adaptive Stretch™ technology ensures a perfect fit that grows with your changing body. 

The material is certified according to Oeko-Tex® Standard 100. 

Made from 95% Nylon and 5% Spandex

Machine wash hot up to 60°C

Gentle cycle only 

Non-chlorine bleach if needed  

Hang to dry, do not iron, do not dry clean 

Wash before wearing 

Wash with like colours 


Meet the Keep Cool™ range of bras from Medela

Why choose the Keep Cool™ Sleep Bra
Finding the Right Size
What's Included
Helpful Videos

How to measure nursing bra size 
The first step to find the right bra is getting accurate bust measurements, which can be done easily in the comfort of your home, best with a soft tape measure.
Every woman is unique and this calculation is the first and most important step.  

We have 5 easy steps for you to measure yourself: 

  • Measure around your bust, measure around your under bust 
  • Subtract your under bust measurement from your bust measurement
  • Use our table to find your cup size
  • Find your band width according to your under bust measurement 
  • Use our size chart to find your correct size by combining cup size with band width

Check out our new video how to choose the correct size of your next Medela bra.  

1 x Keep Cool™ Sleep Bra 

Should I wear a nursing bra to sleep? 

You can wear a nursing bra to bed as long as it is comfortable for you. During pregnancy and nursing the breast grows and you might want to have a little support even when sleeping. Our Sleep Bra is designed with minimal seams and no hooks, so nothing disturbs your skin while you sleep. It has a crossover function to allow for easy access for nursing during the night. Another benefit to wearing a bra for sleep is that you can also wear breast pads to avoid any leakage marks on your clothes.  

How many nursing sleep bras do I need? 

You should keep in mind that a sleep bra might need to get washed frequently so we recommend you have enough to wash and wear in exchange. We have a wide offering of bras to fit different needs on top of our sleep bra. If you need more support during the day, you might find that the Keep Cool™ Breathable Maternity & Nursing Bra will offer you that gentle support. If you want to have extra support you can opt for our Keep Cool™ Ultra Breathable Maternity & Nursing Bra. For more details please check out the full collection.

Is this a good bra for sleeping to keep your breast shape after pregnancy? 

The simple answer is: yes. Our Keep Cool™ Sleep Bra offers you gentle support at a time when you will most likely need it due to your breasts being larger and more sensitive than you are used to. Our Keep Cool™ Sleep Breathable Maternity & Nursing Bra also has room for breast pads, so you can protect it and your clothes from leakage. And it is the most comfortable piece in our collection for laying down. On top of no hooks for comfort, it has a big breathing zone between the shoulder blades and a crossover design at the front for easy feeding. 

Is this Sleep Bra also suitable as an ordinary bra? 

It depends on your preference and the size of your breasts, but if you are looking for gentle support then this could be a good alternative.  

Complementing Products