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Comfort and life stages

Sleep bras for comfortable nights

A sleep bra is a soft, wire-free bra made to wear in bed. Some people sleep better with gentle support, especially with a fuller bust, in pregnancy or while feeding.

A soft white cotton wire-free bra with wide straps on blush linen, beside a folded berry T-shirt

By Jenisha Jonchhe Researched and tested where possible Updated

Affiliate links: this guide links to Amazon UK. As an Amazon Associate, My Bra Size earns from qualifying purchases. It never changes the advice or the size we suggest.

What to search for on Amazon UK

Add your UK size to the search on Amazon (for example “34G”). Not sure of it? Use our bra size calculator first.

  1. 1

    Crossover cotton sleep bra

    A soft wrap front that pulls on, with no hooks to lie on.

    Search Amazon UK for crossover cotton sleep bra (affiliate link, opens in a new tab)
  2. 2

    Seamless pull-on sleep bra

    Knitted in one piece, so there are no seams or edges to press into you at night.

    Search Amazon UK for seamless sleep bra (affiliate link, opens in a new tab)
  3. 3

    Sleep bra for a fuller bust

    Wider bands and deeper cups give gentle hold to a heavier bust when you lie on your side.

    Search Amazon UK for sleep bra large bust (affiliate link, opens in a new tab)

As an Amazon Associate, My Bra Size earns from qualifying purchases. Links open Amazon UK; prices and stock are set by Amazon and its sellers. Search results change often, so a product appearing there has not necessarily been tested. Product photos, where shown, come from Amazon. How we handle affiliate links

A sleep bra is a soft, wire-free bra designed to be worn in bed. It holds your breasts gently so they do not move uncomfortably when you turn over, without the firm band and wires of a daytime bra.

Who finds a sleep bra helpful?

  • Fuller busts, where breasts pull to the side when you lie down.
  • Pregnancy, when breasts can feel tender.
  • Breastfeeding, to hold breast pads in place. See our nursing bras guide.
  • After surgery, if your care team recommends it. See our guide to post-surgery bras.

It is entirely a comfort choice. There is no good evidence that sleeping in a bra prevents sagging, and there is no harm in sleeping without one.

What to look for

  • No wires and no hooks at the back, so there is nothing to lie on.
  • Soft, breathable fabric such as cotton, bamboo or modal.
  • A wide, gentle band that stays put without digging in.
  • A crossover or pull-on front that is easy to take on and off.

How should a sleep bra fit?

Softer than a day bra, but not loose. Many are sized S to XL; use your UK size from our bra size calculator to find yours on the maker’s chart. The band should not roll up or leave marks by morning, and the cups should hold your breasts without squashing them. If the band leaves deep marks, go up a size.

Care

Wash cool and dry flat or on a line. Soft knits lose their shape in a tumble dryer.

Questions people ask

Is it bad to sleep in a bra?
No. It is a matter of comfort. A soft, wire-free bra that fits well is fine to sleep in. Avoid tight bands or wires overnight.
Does sleeping in a bra stop sagging?
There is no good evidence that wearing a bra at night prevents breasts from sagging. Wear one if it makes you more comfortable.
What size sleep bra should I buy?
Sleep bras are often sold in S to XL. Match your UK band and cup size to the maker’s chart; if you are between sizes, choose the larger one for a looser night-time fit.

Written by

Jenisha Jonchhe

Jenisha Jonchhe is a New York-based fashion writer and designer with academic training in fashion design. She writes research-led bra sizing and fit guides for UK shoppers.

Researched from brand and retailer size guides, and tested hands-on where possible. Search results on Amazon change often, so a product appearing there has not necessarily been tested. How we research and test