Sports Bra Guide
Nobody likes their breasts bouncing up by their chin on a morning run, or getting red indents from too-tight straps. A properly-fitting bra should comfortably support, not squeeze or sag.
How to find the right size?
1. Measure your bust
Time to get handsy. Grab your tape measure and measure it around the fullest part of your bust. Make sure it’s sitting straight across your back, not all wonky. Mirrors help.
2. Measure your underbust
That’s the bit just under your breasts, where your bra band will sit. Make sure the tape is snug against your skin, but not squishing you tight.

Need an extra pair of hands? Our instore teams are expert fitters. Seriously, they could do this all day.
Rockwear | INT | Under Bust |
Bust Point |
US | EU | AUS UK |
---|---|---|---|---|---|---|
4 | XXXS |
58 |
75 |
0 |
32 |
4 |
6 | XXS |
63 |
80 |
2 |
34 |
6 |
8 | XS |
68 |
85 |
4 |
36 |
8 |
10 | S |
73 |
90 |
6 |
38 |
10 |
12 | M |
78 |
95 |
8 |
40 |
12 |
14 | L |
83 |
100 |
10 |
42 |
14 |
16 | XL |
88 |
105 |
12 |
44 |
16 |
18 | XXL |
93 |
110 |
14 |
46 |
18 |
Shop by Impact Level
High Impact
Activities:
Running, HIIT, gym training, bootcamp, babysitting toddlers for 20 minutes.
Features:
Maximum coverage across the bust for minimal nip slips.
No bounce straps, plus extra padding for comfort and cold days.
Adjustable underband in case of weight fluctuation. Periods. Holidays. We get it.
Non-stretch lining to reduce bounce in the bust. Even during burpees.
Running sling for even more stability on 5k’s and full marathons.
Compression fit to keep everything in place, even when you’re upside down and bent over backwards.
Medium Impact
Activities:
Gym training, weight lifting, boxing, studio workouts, 2am dance parties in your kitchen.
Features:
Sleek designs & stretch fabrics for more flexible movement.
Mid coverage across the bust. Not too much, not too little.
Need support? Elastic in the straps, armholes and neck bind has you covered.
Adjustable straps to fit to your body, perfectly — today and in two months’ time.
Zip across front to easily put it on and take it off. No more 10-minute wrestling matches.
Removable pads for breathability and extra sculpting. The choice is yours.
Low Impact
Activities:
Yoga, pilates, barre, walking the dog, brunch with your mates.
Features:
Minimal hardware for maximum comfort. No zips, hooks, or extra strappy bits.
Thinner straps to hide under singlets while still holding you up.
Less coverage with open back details or low cut fronts. So cute.
Removable pads for extra sculpting. If you’re into that.
Flexible finishes and super soft fabrics, in case you ever wished you could work out naked. This is the next best thing.
Shop by Style
How to Care for Your Sports Bra
If you’re anything like us, you probably also buy a new sports bra every time you get a free trial at a new studio. But did you know, when properly cared for, your sports bra should last at least one year? Here’s how we do it.
Rotate Your Bras
To get more wear out of your sports bra, start implementing a roster and wear your bra once per week. Just like you have cuties on speed dial, always have an extra sports bra ready to go.
Sort Out Sweat
We think sweat is cute, especially in patch form. But it’s also full of chemicals and salt that breaks down elastane. The fix? Do this as soon as you get home: protect your sports bra by popping it in a washbag, before throwing it in the wash. Staying topless is optional.
Wash Gently
Machine wash on a gentle cycle with cold (we mean it!) water. Use mild laundry powder, but never fabric softener as it can interfere with the moisture-wicking properties of our fabrics.
Be Prepared
Zip those zips. Fasten the hooks. Or else risk your bras catching on other fabrics in the wash. Use a wash bag for extra caution. Your mum would be so proud.
Deal With Odour
Catching a whiff at the gym and don’t reckon it’s the guy on the treadmill next to you? Throw a cap of white vinegar in your next wash. It’ll work its magic on odour-causing bacteria.
Rockwear
We play strong

Look good, feel strong.
High performance activewear is at the heart of Rockwear. Product that makes you look & feel strong so you can excel in exercise; however you choose to move.

Sweat the detail.
High quality, technical products that’s actually affordable. We are committed to providing you the best possible product at unrivalled value.

We consider the environment.
We are working towards an ethical and sustainable future: product, process & people included.

Strength in numbers.
We want to empower you to feel strong inside & out; to lift each other up and have fun sweating it out. Rockwear is the Spark of energy that helps you enjoy exercise.

You are welcome.
It’s easy to shop with Rockwear. FREE 365 day returns in-store, flexible payment options, free click & collect (ready in 2 hours).