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 2,889 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: 4.893683 / 5 from 2897 reviews.
The Coolum Core Support One Piece Swim in Black Texture is highly praised for its beautiful and comfortable fabric, flattering fit, and supportive design. Customers appreciate its true-to-size fit, excellent coverage, and the quality of the product. The swimwear is designed to stay in place and provide comfort and confidence from splash to sunlounger.
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","pattern"].
"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. :)"
"I am a definite aussie size 14 bottoms and 14/16 top with big boobs. I bought the Large size and it is a great fit. I also love the dark green colour. I saw them advertised much more expensive and when I saw them at $50 I ordered straight away. The package arrived in a few days. I'm so happy with the one piece. It really hides my fat belly and is very flattering. I'm going on holiday in about 2wks time and really pleased to have found something that looks good on me."
"I love this suit the colour is so flattering, the allowances are perfect around the bust and waist I found it generous in the body length but not unwearable. I feel so comfortable wearing it and it has been many years since that has happened. I’m grateful for this design. It looks so simply but works like magic. I’m thinking of getting another in a different colour and maybe a smaller size. At $50.00 they are a must."
"I’m a size 8 but with a 66 yr old DD/E bust. Haven’t worn the cozzie in the water yet but appears to be a good fit and keeping “the girls” happily in their place. My only thought to improve my fit would be a bit more bum coverage as my bum is now really flat and could be a bit more supported. I have purchased two Coolum one piece at great sale price and a Coolum Tankini top has also just arrived - yet to try."
"While I’m yet to wear my swimsuit in the water I’m very happy with the fit and comfort, and I love the colour. I took the advice to choose the smaller size, however I’m pleased with the coverage, which is challenging to find when you have a bigger bust (F cup). The style is flattering too, which is a nice change!"
"I was very sceptical about buying a swimsuit online, even though Active Truth was recommended by 2 friends. I was pleasantly surprised - they are of great quality, fit perfectly, have great support in all the right areas, and very flattering. After my first wear at the beach I went straight home to buy a second pair during the sale, but sadly my size was all sound out. I will definitely be buying more. If you are at all in doubt about this brand then don’t be - they are exceptional!"
"I was very worried about ordering this swimsuit but am so happy I did. Customer service gave me great advice on size and I took a gamble on the Raspberry Coolum pair. It fitted perfectly and although I am normally super self conscious going swimming I felt really good in it. It was a gorgeous colour and a perfect fit."
"The material is soft and feels supportive. I love the colour which is true to pictured examples. The top fits well and flatters my narrow shoulders and F cup bust. Unfortunately the leg/tummy coverage isn't adequate for me as it cuts too high up. If I pull it down to cover my lower section then the bust is too low. I wish I saw the separately advertised long torso version before purchasing as that probably would have solved the problem. I got some Coolum tankini tops on sale and these are perfect. I wish the tankini tops were available in more colours."
"Absolutely love this swimsuit! The fit is really flattering and the support is fantastic without feeling restrictive. The khaki colour is gorgeous and looks a little more elevated. It’s comfortable, stays in place and feels really well made. Definitely one of those swimsuits that makes you feel confident wearing it, highly recommend!"
"I love this swimsuit! Fit perfectly. Not sure about the weight and whether it will be too hot. I order other products because of this one : tankini and high waisted pants, and the zip up sun protector (love this too) . The the bottoms are too big and just can on her to checke returns"
