What is No Bra Day?
No Bra Day is an informal observance held every year on October 13, during Breast Cancer Awareness Month. It started online in 2011 and asks people to go without a bra for the day as a prompt to think about breast health and to check their breasts.
It is not an official health campaign. Cancer charities do not run it, it does not raise money by itself, and it has been criticized for being more about bodies than about the disease. Going braless also has no effect on breast cancer risk either way: research has found no link between wearing a bra and breast cancer.
If you want the day to mean something, the useful part is the reminder: know what is normal for your breasts, report changes early and keep up with screening.
Every October the hashtag comes back, and every year the same questions come with it. What is the day actually for? Is going braless good for you? And does any of it help anyone with breast cancer?
Here are the honest answers, and a few ways to mark the day that do some good.
- Date: October 13, inside Breast Cancer Awareness Month.
- Origin: an online campaign from 2011, not a medical or charity event.
- Bras and cancer: no link. Wearing or skipping a bra does not change your risk.
- The useful part: a yearly reminder to check your breasts and book screening.
- Going braless is fine if it is comfortable; it is a personal choice, not a health one.
- Support survivors by donating to or volunteering with a breast cancer charity.
Where No Bra Day Came From
The day started as an internet campaign, not a medical one, and it took a few years to settle on a date.
The first No Bra Day was posted online on July 9, 2011 by an anonymous user. That October, a Toronto plastic surgeon launched BRA Day, short for Breast Reconstruction Awareness Day, a medical campaign to tell women about reconstruction options after a mastectomy. The two ideas became tangled together online, and for a few years both July 9 and October 13 were promoted.
Since 2015, No Bra Day has been held on October 13. The October date ties it to Breast Cancer Awareness Month, and the stated goal of the original post was simple: breast cancer is something to take seriously and to be checked for.
Why It Is Controversial
Plenty of people, including people affected by breast cancer, are uncomfortable with the day. Their reasons are worth knowing.
None of that means you cannot enjoy a comfortable day without a bra. It does mean the day works best as a reminder to act, not as the act itself.
Do Bras Cause Breast Cancer?
No. The idea has been around since the 1990s, and the research does not support it.
The claim that bras cause breast cancer took off with a 1995 book that argued bras block the lymphatic system and trap toxins in breast tissue. It spread widely, but the book was not based on controlled research, and the theory does not match how breast cancer develops.
In 2014, researchers at the Fred Hutchinson Cancer Research Center tested the idea directly. They compared more than 1,000 women aged 55 to 74 who had breast cancer with a group of women who did not, and looked at how many hours a day they wore a bra, whether they wore underwire and how old they were when they started. None of those factors was linked to breast cancer risk.
| Claim | What the evidence says |
|---|---|
| Wearing a bra causes breast cancer | No link found in controlled research |
| Underwire bras raise the risk | No link found |
| Wearing a bra for more hours raises the risk | No link found |
| Starting to wear a bra young raises the risk | No link found |
| Going braless lowers the risk | No evidence it changes risk either way |
The risk factors that do matter are things like age, family history, inherited gene changes, breast density, alcohol, weight after menopause and physical activity. Your doctor is the right person to talk to about your own risk.
Choose a bra, or no bra, for comfort and support. Wires, bands and hours of wear are fit questions, not cancer questions. If a bra digs, chafes or leaves marks, it does not fit; our guide to underwire poking and digging explains what that usually means.
What Actually Helps: Breast Awareness and Screening
If No Bra Day prompts one thing, make it this. Know your normal, report changes and keep up with screening.
Breast awareness means knowing how your breasts usually look and feel, so you notice when something changes. You do not need a formal technique. Look in the mirror and feel your breasts and underarms now and then, in the shower or lying down, and pay attention to what is normal for you at different points in your cycle.
Most changes turn out to be something harmless, but the only way to know is to have them looked at. If you notice any of these, book an appointment with your doctor rather than waiting.
For screening, the US Preventive Services Task Force recommends a mammogram every two years from age 40 to 74 for women at average risk. If you have a family history, an inherited gene change, dense breasts or other risk factors, your doctor may suggest starting earlier or adding other tests. If you have noticed nipple changes, our guides to inverted nipples and nipple types explain what is usually normal and what is worth a check.
Ways to Mark No Bra Day That Do Some Good
A hashtag raises awareness for a day. These raise it for longer.
- Do a breast awareness check and note anything new.
- Book your mammogram if you are 40 or over and due one.
- Ask about your family history and share it with your doctor.
- Donate or volunteer with a breast cancer charity that funds research or patient support.
- Check in on someone in treatment or recovery, and ask what would actually help.
If you post about the day, pairing it with a reminder to get checked or a link to a charity does far more than the photo alone.
Going Braless Comfortably
Whether you skip a bra for a day or most days, it is a comfort choice. A few things make it easier.
There is no medical reason you have to wear a bra, and no good evidence that wearing one prevents sagging or that going without one causes it. Breasts change shape over time mainly with age, pregnancy, weight changes and genetics. What a bra does is support, reduce movement and change how clothes sit, and how much that matters depends on your size, your activity and your preference.
If you like the feeling of a bra-free day but want a little support, a wireless bra or bralette is the natural middle ground. Our wireless bra guide explains which designs genuinely support you, our bralette guide covers every style, and bralettes for large busts covers the ones that work in fuller cup sizes. For nights, our guide to sleeping in a bra covers whether it makes any difference. Nipple covers and plus size bralettes are there if you want them.
After Breast Surgery
For many people affected by breast cancer, a bra is not optional. It is part of recovery and comfort.
After a mastectomy or lumpectomy, many people wear a post-surgery or mastectomy bra: a soft, wire-free bra that often closes at the front and has pockets inside the cups to hold a breast form, also called a prosthesis. Front closures matter because reaching behind the back can be difficult while healing.
The Natori Pretty Smooth Zip Front Pocketed Wireless Bra is one example: it zips at the front, has soft cotton-lined cups and interior pockets for a prosthesis. Our mastectomy bras collection is small, so if you need a specific style or size, ask your care team or a certified mastectomy fitter, who can also advise on timing after surgery. Always follow your surgeon's guidance on when and what to wear.
Ask before you buy. Someone in recovery may have been told exactly what to wear and when, and a gift card or a practical offer of help is often more welcome than a surprise.
What This Means for You
No Bra Day is an informal October 13 observance that began online in 2011. It is not run by any cancer charity, and going braless does not change breast cancer risk: research has found no link between wearing a bra and the disease.
The part worth keeping is the reminder. Know what is normal for your breasts, see a doctor about any change, and keep up with mammograms from 40. Wear a bra, a bralette or nothing at all on the day, whichever is most comfortable, and if you want to help, give your time or money to people affected by breast cancer.
Comfort, Fit and Breast Health
Wireless support, nipple questions and what is normal.
Wireless BrasHard NipplesInverted NipplesFrequently Asked Questions
When is No Bra Day?
What is the purpose of No Bra Day?
Do bras cause breast cancer?
Is it healthy to go braless?
Why is No Bra Day controversial?
What is the difference between No Bra Day and BRA Day?
What breast changes should I get checked?
When should I start getting mammograms?
This article is for general information and is not medical advice. If you notice a change in your breasts, or have questions about your breast cancer risk or screening, talk to your doctor.
