When the bra rides up at the back
Short answer: If your bra rides up at the back, the band is too loose or too big. The band should sit level all the way round and stay in place when you raise your arms, because the band carries most of the support.
The band carries the load
Most of the support in a bra comes from the underband, not the straps. If the band is loose, it has nothing to grip, and the whole bra slides up your back. At the same time, the bust falls forward and the straps start pulling on your shoulders to make up for it.
The test
Raise your arms above your head and look in the mirror, or feel with your hand. If the band moves up at the back, the size is wrong. The band should sit at the same height front and back. If it sits higher at the back than the front, that is a clear sign it is too loose.
Do not tighten the straps
Many try to fix the problem by tightening the straps. That only shifts the weight onto the shoulders and causes soreness after a few hours. The straps also pull the band even higher at the back. Wide straps spread the pressure better. Read more about a bra for a large bust with wide straps.
One band size down
The fix is usually a smaller band. If you go down a band size, you often need to go up a cup size to keep the same cup volume. Measure under the bust with the tape close to the body. See how to find your bra size at home.
Use the loosest hook
A new bra should fit on the loosest hook. That lets you tighten it as the elastic gives over time. If a new bra only fits on the tightest hook, the band is too big from the start, and it will begin to slip long before it would otherwise be worn out.
Worn elastic
If the bra used to stay put and no longer does, the elastic is worn out. This happens gradually, so many only notice once the band already slides. A clear sign is that you have moved to the tightest hook and it is still not enough. See when should a bra be replaced.
Soft bras
A bra without underwire relies especially on the band, because there is no wire to hold the shape. That is why you notice sooner if the band is loose. A wide, soft band often sits more steadily than a narrow one and is comfortable all day. See the styles in bamboo bra without underwire.
Your body changes
Weight, exercise and hormones can change your underbust measurement. A bra that fitted a year ago may now be too big in the band. Measure yourself again if an otherwise good bra suddenly starts to slide. It is often quicker than looking for a fault in the bra.
Put it on properly
Lean forward slightly when putting on your bra, so the bust falls into the cups. Straighten the band at the back so it sits level before adjusting the straps. Many pull the band up without noticing when they fasten it at the front and turn it round.
Washing
Wash in a laundry bag at 40 degrees and never use the tumble dryer, which damages the elastic in the band. Let the bra dry flat. When the elastic lasts longer, the band stays in place longer too. Read more in the washing guide.
Frequently asked questions
Why does my bra ride up at the back?
Because the band is too loose or too big. The band carries most of the support, and if it sits loosely it has nothing to grip, so it slides up.
Does tightening the straps help?
No. It only moves the weight onto your shoulders and causes soreness. The straps also pull the band even higher up your back instead of helping.
What if it used to fit?
Then the elastic is probably worn, or your measurement has changed. Measure again, and if you are already on the tightest hook, it is time for a new one.
You can find the full range at Bamboo-Clothing.com.
