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Category: bra physics

How wireless bras create support: the 3 types and how to choose between them

I remember my first attempt at sewing a bralette, I copied the cups and cradle of my favourite half cup wired bra, eagerly sewed it together, put it on and… oof. It was bad, the whole thing just collapsed on me, boobs spilling out the front, the works. You see, every underwired bra supports the…
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2026-09-26
Control Your Flat Spot: Learn how to direct strap tension to get the cup shaping you want!

I have spoken before about how there are regions of flatness in a bra cup, but I think the topic needs another visit, as I’ve found people sometimes underestimate how much flatness caused by the strap can impact the shaping of the cup – especially in large cups. By the end of this post you…
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2023-10-16
Are Racerback sports bras better? Understanding strap configurations

There are so many different strap configurations in sports bras that it’s almost impossible to categorise them all. From standard T and U backs to racerbacks, J hooks, cutout racerbacks, decorative multi straps, what should you choose? Is there a physical reason why these strap styles are so popular, or is it just fashion? In…
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2023-01-06
Should you worry about bending your wires? (A response to Bare Essentials)

For those who are unfamiliar,”Bare Essentials: Bras” is a book by Jennifer Lynne Fairbanks, which is most known for its unique bra drafting techniques which allow you to make a custom bra draft based on your measurements. I won’t be talking about those in this post – the book is expansive and also covers bra…
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2022-06-04
Bra Physics 4 – What can we learn about the cups and straps?

In this part, I talk about the physics involved in the cups and the straps. The cups are by far the most complex part of the bra, and their geometry befuddles millions of people worldwide. I won’t be talking about geometry here – cup shape, strap positioning, and necklines (well, I do a tiny bit…
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2022-05-02
Bra Physics Part 3: What can we learn about the wires and cradle?

This is Part 3 of my Bra Physics series. In Part 1, I described the forces involved in supporting your breasts and what parts of a bra are responsible for providing those forces. In Part 2 I introduced the concepts of stress and strain, and applied these and part 1’s principles to the design and…
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2022-02-19
Necklines always cutting in? Why full cups may be your foes and power bars your unlikely friends

I have a series of posts about the physics behind supportive bras. In the first post, I described that the band should make up most of the support system of a bra – but this doesn’t mean the straps are not important. The best way to boil that post down is that the band provides…
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2022-02-01
Bra Physics Part 2: What Can We Learn about the Band?

In my last bra physics post, I described the forces involved in supporting your breasts and what parts of a bra are responsible for providing those forces. How can this knowledge inform our decisions when making or choosing bras? This post is part of a series and covers the bands of bras – just the…
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2022-01-10
The Physics of a Supportive Bra Explained

To all boob owners reading this: I would like you to take off the clothes on your upper half and stand in front of a mirror. I would buy you dinner first, but unfortunately on my student budget I can’t afford to wine and dine all of my readers, so you’ll just have to take…
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2021-12-14