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 3,579 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: 4.8997207 / 5 from 3580 reviews.
Customers praise the Coolum Core Support One Piece for its excellent fit, comfort, and support. The high-quality fabric and flattering design contribute to its positive reception. The swimsuit's true-to-size fit and amazing color add to its appeal.
Review topics: ["feel","delivery","fit","issues","fabric","quality","look","colour","size","material","coverage","swimsuit","straps","style","cut","bathers","shape","texture","design","swimmers","comfort","padding","value","support","neckline","stretch","weather","piece","length","waist"].
"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."
"I was a bit worried about this swimsuit as it didn’t have as big a cup range as the Coolum in the bust but I preferred the thicker straps… And I am glad I read the approve reviews and got it anyway. It fits really well, even with a larger bust. Very flattering cut and beautiful material!"
"I absolutely love the colour, style and fabrication of this swimwear. First time buyer and very impressed. I bought mine on sale. No concerns with my next purchase as this is a high quality product. I have a little tummy now that I am 60 but this swimsuit is extremely flattering!"
"The style is very flattering to the bust and I love how it sucks the wobbly tummy in without being tight. The colours and fabric are stunning. I am self concious about showing bum cheek, so I would like more coverage in that area. The rest fitted perfectly. I am inbetween sizes so I sized down as advised on the website, and definately needed to."
"I bought my true size, and they fit excellent. I agree with recommendation on website to size down as they are generous and do give a little. I love them. Have literally bought multiple pair for myself and as gifts for my sisters and best girlfriends. I love a bargain and picking up my size and chosen colours at $50 each & with a free gift has been awesome for me. Love love love it."
"Love the cossie 😍 shape is good doesn't ride up your bum and is not too skimpy at the front ... the only thing is i would like a bit more support for my boobs .... just the elastic a bit tighter ... certainly not a huge problem but overall I love it and would buy again 😍"
"I absolutely love this swimsuit! It fits perfectly and is so comfortable. As a mum, I love that it stays in place and I don’t have to worry about anything slipping out or the swimsuit riding up. It gives great coverage and it feels comfortable. Perfect for the Australian summer! ☀️"
"I was quite surprised as my online shopping for clothes has been hit and miss with quality, but this pair of swimmers was such good quality and the fit was perfect I went back and bought another two pairs in different colours and styles, definately a great find and purchase. The quality is beautiful!"
"A fantastic one piece! Amazing colour and material!! Sits beautifully in all the right spots, while being supportive! Bought for a recent holiday and felt amazing in it pool side on the lounger and whilst playing pool basket ball!! Will buy more for sure!! Highly recommend!! Only regret, I didn't get photos!!!"
"Great support, flattering style and super comfortable. I would say this is the best one piece costume I’ve ever owned. The fabric is also robust and the texture running through it hides all your figures “little inconsistencies” 🥹. I could wear this one piece all day and not know I had it on. I think my boyfriend was equally as impressed with the fit and particularly the colour. 🤣🤣"
