The swimsuit thousands of women love: lifts and supports without wire, sculpts your waist, and smooths all over.
"I was sceptical that these would support my F cup natural breasts but they do! ... Very comfortable, stretchy and supportive."
| S | M | L | XL | 2XL | 3XL | |
| Size Conversion | ||||||
| AU | 8-10 | 10-12 | 12-14 | 16-18 | 20-22 | 24-26 |
| US | 4-6 | 6-8 | 8-10 | 12-14 | 16-18 | 20-22 |
| Bust | ||||||
| CM | 87-93 | 93-99 | 99-105 | 106-114 | 115-123 | 124-130 |
| IN | 34-37 | 37-39 | 39-41 | 42-45 | 45-48 | 49-51 |
| Waist | ||||||
| CM | 67-73 | 73-79 | 79-85 | 86-94 | 95-103 | 104-112 |
| IN | 26-29 | 29-31 | 31-33 | 33-37 | 37-40 | 40-44 |
| Hips | ||||||
| CM | 97-103 | 103-109 | 109-115 | 116-124 | 125-133 | 134-142 |
| IN | 38-40 | 41-43 | 43-45 | 45-48 | 49-52 | 53-56 |
For leggings, the hip measurement is the most important for finding your perfect fit, especially if you're between sizes.
Hip: the widest part of your hips making sure the tape measure is even over your bum
Waist: your natural waistline above your belly button and below your rib cage
Bust: the fullest part of your bust at nipple level
Send your measurements to hello@activetruth.com for personalised advice from our fit experts.
| S | M | L | XL | 2XL | 3XL | |
| Size Conversion | ||||||
| AU | 8-10 | 10-12 | 12-14 | 16-18 | 20-22 | 24-26 |
| US | 4-6 | 6-8 | 8-10 | 12-14 | 16-18 | 20-22 |
| Bust | ||||||
| CM | 87-93 | 93-99 | 99-105 | 106-114 | 115-123 | 124-130 |
| IN | 34-37 | 37-39 | 39-41 | 42-45 | 45-48 | 49-51 |
| Waist | ||||||
| CM | 67-73 | 73-79 | 79-85 | 86-94 | 95-103 | 104-112 |
| IN | 26-29 | 29-31 | 31-33 | 33-37 | 37-40 | 40-44 |
| Hips | ||||||
| CM | 97-103 | 103-109 | 109-115 | 116-124 | 125-133 | 134-142 |
| IN | 38-40 | 41-43 | 43-45 | 45-48 | 49-52 | 53-56 |
For swimwear, measure your hips, waist and bust.
Our swimwear is made to fit up to an G cup. If you are between sizes we generally recommend you size down, unless you are above an E cup.
Hip: the widest part of your hips making sure the tape measure is even over your bum
Waist: your natural waistline above your belly button and below your rib cage
Bust: the fullest part of your bust at nipple level
Send your measurements to hello@activetruth.com for personalised advice from our fit experts.
| S | M | L | XL | 2XL | 3XL | |
| Size Conversion | ||||||
| AU | 8-10 | 10-12 | 12-14 | 16-18 | 20-22 | 24-26 |
| US | 4-6 | 6-8 | 8-10 | 12-14 | 16-18 | 20-22 |
| Bust | ||||||
| CM | 87-93 | 93-99 | 99-105 | 106-114 | 115-123 | 124-130 |
| IN | 34-37 | 37-39 | 39-41 | 42-45 | 45-48 | 49-51 |
| Waist | ||||||
| CM | 67-73 | 73-79 | 79-85 | 86-94 | 95-103 | 104-112 |
| IN | 26-29 | 29-31 | 31-33 | 33-37 | 37-40 | 40-44 |
| Hips | ||||||
| CM | 97-103 | 103-109 | 109-115 | 116-124 | 125-133 | 134-142 |
| IN | 38-40 | 41-43 | 43-45 | 45-48 | 49-52 | 53-56 |
For maternity leggings, the hip measurement is the most important for finding your perfect fit.
We've designed our pregnancy leggings with plenty of room for your growing bump, so don't use your waist measurement.
Hip: the widest part of your hips making sure the tape measure is even over your bum
Waist: your natural waistline above your belly button and below your rib cage
Bust: the fullest part of your bust at nipple level
Crops
Due to the changes your body experiences during breastfeeding, we recommend comparing your under bust measurement (where your bra band sits) to the sizing chart below.
Our nursing crops cater up to a DD cup. For larger cup sizes you may wish to size up.
| S | M | L | XL | 2XL | 3XL | |
| Underbust | ||||||
| CM | 74-80 | 80-86 | 86-92 | 93-99 | 99-106 | 106-112 |
| IN | 29-31 | 31-33 | 33-36 | 37-39 | 39-42 | 42-44 |
What makes the Coolum work
Supportive built-in shelf bra. No cups sewn in, so you can add your own padding.
Core support power mesh holds you in and smooths without squeezing.
Shorten or lengthen the straps so everything sits where it should.
Built for pool laps, aqua aerobics and long days in the Aussie sun.
What women ask us most about the Coolum.
Coolum fits true to size and comes in sizes 8 to 26. If you're between sizes, go down. The built-in shelf bra supports B to G cups, so you don't need to size up for a bigger bust.
Yes. The built-in shelf bra supports B to G cups with no underwire, and the adjustable straps let you fine-tune the lift.
There is an opening to add your own padding or inserts securely.
Yes. Core support power mesh through the front holds in your tummy and smooths without squeezing.
Moderate, mid-rise coverage. Not too skimpy, not too frumpy.
Coolum also comes in a Long Torso fit with 7.5cm of extra front body length.
Yes, lots of women wear it after a mastectomy. The built in shelf bra has pockets, so you can add your own padding, prosthesis or breast form. Plus there's no underwire to press on sensitive areas.
Yes. All Active Truth swimwear is made from chlorine-resistant fabric, so it's built for pool laps, aqua aerobics and regular swims.
Yes. All our swimwear is rated UV 50+.
We offer exchanges to help you find your perfect fit and accept returns for 30 days from the date of purchase. Returns for refunds are only available for items purchased at full price.
Items marked Final Sale can't be refunded, returned or exchanged. See our returns policy.
Yes. Shipping is free on orders over $200.
★★★★★ 4.9 from 3,039 reviews
Better than expected!
"This is the first time in some years I looked like I had shape in my swimwear and actually felt supported..."
I love my new swim
"So great for tummy control. After 3 babies you need to feel great again in swimwear. I bought a second pair once I received my first"
Best swimsuit ever
"This is the most comfortable swimsuit I have ever owned and I’m 65 so that’s a lot of swimsuits! ... stays in place when wearing it"
Real customers in their Coolum
Overall rating: 4.895615 / 5 from 3056 reviews.
The Coolum Core Support One Piece Swim is highly regarded for its excellent quality, flattering fit, and supportive design. Customers praise its comfortable fabric, perfect fit, and great coverage, making it a top choice for swimwear in Australia.
Review topics: [feel, fit, fabric, colour, quality, look, size, issues, material, coverage, straps, swimsuit, style, cut, shape, bathers, texture, design, delivery, swimmers, comfort, padding, value, support, neckline, stretch, weather, piece, length, confidence].
"Bought two of these swimsuits in the $50 sale and already want more. Great fit for F cups! And high quality & sucky inny in all the right places. The bottom is slightly cheeky but I don’t mind as most swimsuits have too much coverage in that area. Love the ribbed texture fabric instead of the plain smooth. Just adds another element."
"Most comfortable yet flattering swimsuit I’ve worn since I’ve had children and gained some weight. I’ve been struggling to find a swimsuit that I feel comfortable, supported and confident in for years and I’m so glad to have tried active truths swimsuit. I’m already recommending to my friends/family and I’ll be ordering more colours for sure. :)"
"Honestly I couldn’t have asked for a more perfect swim suit. I chose a size up, which was recommended because of bra size (I’m normally a 10) and the fit was absolutely perfect and the most flattering, gathered just in the right spot to enhance my waist - the colour is gorgeous too. Love the material too. Definitely will be buying more in different colours."
"I purchased two lovely bathing suits. The Coolum is great and I love wearing it. The Sorrento was a different fabric, the smooth fabric, and was a little less giving. I was able to exchange the suit for one with the textured fabric, which has the additional give I needed. Perfect! Thank you to the staff for facilitating the exchange so easily and quickly. Very happy!"
"Love the colours and style. Maybe a tad more material around bottom and a little more texture around tummy would give them a 5 star for me. But great price on special."
"I am a heavy, full F cup and haven’t bought new swimmers for over 5 years because I’ve always struggled to find a good quality product that will hold my boobs. So I was skeptical about these but bought a pair whilst on sale. BEST PURCHASE EVER! They are comfortable, great quality, and really do fit an F cup! No spilling out the top or the sides."
"These swimmers are as good as all the reviews. They are flattering and support the breasts as described. I am a 16DD and they fit me perfectly. I know I’m going to swim in these and not have to worry that my boobs will fall out! I love the colour, a beautiful teal and I love the way they fit across my tummy. I’m so glad I actually bought these after looking at them for months!"
"I bought the coolum one piece bathers on sale as the colour has been discontinued. Very happy with my purchase.. The colour is lovely (not sure why discontinued?) and they are a nice fit. I am a E cup normally but only a size 12 so its often difficult to get one piece that fit properly. These do just that. I got a medium, which work well on me. I'm considering another pair. might"
"Absolutely love the swimsuit I ordered from Active Truth. The colour was perfect and just like it looked online. Very happy with the cut and the quality of the fabric. I would definitely recommend this product and will be buying all my swimwear from this Company from now on."
"Absolutely love my Coolum - amazing fit and quality. The customer services was exceptional too. I don't normally buy clothing, especially swimwear online, but with the help and patience of Kim, I couldn't be happier. Thank so much"
