Your mum, that one magazine from 2003, and a girl you knew at school have all told you something about bras that simply isn't true. Sleeping in one won't stop sagging. Underwire won't give you cancer.

And no, you don't need to wash it after every single wear. Grab a cuppa, we're setting the record straight on all ten.

In This Guide

• Sleeping in a bra stops sagging
• Underwire bras cause breast cancer
• Your bra size never changes
• Tighter straps mean more lift
• Wire-free bras can't really support you
• You should wash your bra after every wear
• You should always fasten on the last hook
• Strapless bras always slip down
• Sports bras are only for intense workouts
• Going without a bra causes sagging

Let's be honest, bra advice gets passed around like a game of Chinese whispers at a sleepover. Someone's auntie said it once, it sounded plausible, and thirty years later it's basically gospel.

Meanwhile nobody's actually fact-checked any of it.

We went digging so you don't have to. Here are the ten bra myths we hear on repeat, dragged into the light and properly busted, one cup size at a time.

Myth 1: Sleeping in a Bra Stops Sagging

Verdict: Total fiction

This one gets whispered like an ancient beauty secret, usually by someone who swears it worked for their gran. Sagging comes down to genetics, gravity, ageing, and life events like pregnancy, not whether you kept your bra on for eight hours of unconscious tossing and turning.

Your bra isn't a nightly security guard for your chest. If a soft wire-free style genuinely feels comfier to sleep in, brilliant, wear it. Just don't expect it to outsmart gravity.

Myth 2: Underwire Bras Cause Breast Cancer

Verdict: Nope, and this one needed busting decades ago

This myth has had more debunkings than a bad conspiracy theory, and it still won't die. There is no credible scientific link between underwire bras, or any bras, and breast cancer risk. What underwire can do is poke, dig, or generally misbehave if the fit is off, but that's a fit problem, not a health scare.

Ditch the wire because it's uncomfortable if you like. Just don't ditch it out of fear.

Myth 3: Your Bra Size Never Changes

Verdict: If only

Weight shifts, hormones, pregnancy, breastfeeding, and plain old ageing all quietly rewrite your bra size without sending you a memo. Wearing the same size since sixth form isn't loyalty, it's most likely just an overdue remeasure.

If you genuinely can't remember your last fitting, that's your sign. Grab five minutes with a fit guide and see where you've actually landed these days.

Myth 4: Tighter Straps Mean More Lift

Verdict: A very sore shoulder says otherwise

The lift is meant to come from the band, not two thin strips of fabric doing all the heavy lifting. Crank the straps hard enough to compensate for a tired band, and you'll end up with grooves in your shoulders and precisely zero extra support to show for it.

If you're constantly yanking your straps tighter just to feel held up, that's the band or the bra talking, not your straps.

Myth 5: Wire-Free Bras Can't Really Support You

Verdict: Someone hasn't tried a good one yet

There was a time when underwire genuinely was the only route to real shape and support. That time is long gone. A properly built wire-free bra with a wide band and well-shaped cups, like the Ultimate Comfort Wireless Support Bra, holds its own all day without a single wire in sight.

Comfort and support aren't a trade-off anymore; they're just the bra doing its job properly.

Myth 6: You Should Wash Your Bra After Every Wear

Verdict: Please, give it a break

Unless it's visibly grubby or you've properly sweated through it, a bra can happily go two to three wears before it hits the wash. Washing it after every single use actually breaks down the elastic faster, which means you'll be replacing it sooner, not keeping it fresher for longer.

Rotate a couple of bras instead. Your washing machine and your elastic will both thank you.

Myth 7: You Should Always Fasten on the Last Hook

Verdict: Backwards, actually

Brand new bras are meant to start life on the loosest hook, leaving you room to tighten as the elastic naturally relaxes with wear. If you're already maxed out on the tightest hook and it's still not snug, that's not a fit fluke; that's your bra quietly telling you it's retired. Time for a replacement, not a tighter squeeze.

Myth 8: Strapless Bras Always Slip Down

Verdict: A badly made one will. A good one won't

If you've spent every wedding, work do, and night out yanking your strapless bra back up under the table, that's a design flaw, not your fault. The Convertible Strapless Bandeau Bra uses a silicone grip along the band and soft side boning to actually stay exactly where you put it, which is the bit most strapless bras conveniently forget to include. Slipping isn't inevitable. It's just what happens when a bra was never built to stay still in the first place.

Myth 9: Sports Bras Are Only for Intense Workouts

Verdict: Massively underselling them.

Somewhere along the way, sports bras got filed under "gym only," which feels like a real waste of a genuinely comfortable garment. They're just as useful for the school run, a long travel day, or a big shop where you want less bounce and a bit more stability. The Seamless Racerback Sports Bra works just as hard on an ordinary Tuesday as it does mid-workout.

Myth 10: Going Without a Bra Causes Sagging

Verdict: Your bra isn't that powerful.

Much like the sleeping myth, this one gives a piece of underwear far too much credit. Sagging is driven by genetics, age, and gravity over years and years, not by the occasional cosy bra-free evening on the sofa. Wear one because it feels good and does its job when you want it to, not out of guilt about what might happen if you don't.

So there you have it, ten myths well and truly retired. Turns out most bra advice boils down to the same simple truth: get the fit right, wear what actually feels good, and stop letting rules nobody ever checked run your underwear drawer.

Browse the full bra collection to find your next favourite, or run through the fit guide if it's been a minute since you last checked your size.