Martha Kalifatidis opens up post-baby body and why she loves cult Aussie activewear - as they announce 50% flash sale

Contains affiliated content. Products featured in this article are selected by our writers. If you make a purchase using links on this page, Daily Mail Australia will earn an affiliate commission. Click here for more information.   

Martha Kalifatidis has opened up about how her body has changed since having a baby and revealed the activewear brand she swears by that 'hugs you in all the right places'. 

The Married At First Sight star and her partner Michael Brunelli welcomed their first son Lucius into the world last February. 

Now the 36-year-old from Sydney has teamed up with STAX. to launch the latest Premium Seamless V7 collection

On Friday July 12, shoppers will be treated to a 50 per cent off flash sale for only two hours starting from 9am, followed by 40 per cent off from 11am until midnight July 14. 

Speaking of the range with FEMAIL, Martha said: 'Obviously your body changes after having a baby, and I feel like premium seamless has worked for my body type no matter what - pre and post-baby.'

'In the range there is something for everyone, and I feel like I loved premium seamless then because it can hug you in all the right places,' she added.

And that perfect hugging feeling remains the same post-baby, according to the star. 

'It is the same hug, its so comfortable and I feel so confident when I wear it.' 

The brand is best known for its Best Black Tights made from its trademarked NANDEX material, with one pair selling every minute. The customer favourite is comfortable, high wasted and boast a flattering fit for every body shape.

Martha Kalifatidis (pictured) has opened up about how her body has changed since having a baby

Martha Kalifatidis (pictured) has opened up about how her body has changed since having a baby

The 36-year-old from Sydney has teamed up with Aussie activewear STAX. to launch the latest Premium Seamless V7 collection

The 36-year-old from Sydney has teamed up with Aussie activewear STAX. to launch the latest Premium Seamless V7 collection 

When searching for ambassadors, the brand said there was 'no hesitation to feature Martha as the face of the new collection'. 

'The idea was to have the faces of STAX. show their true and seamless selves whilst wearing the collection designed to truly support you, however you feel,'  STAX said in a statement. 

The latest drop features its best-selling seamless pieces in new colourways, including Astro (black), Cedar (brown), Dovetail (black grey), Porsche (green) and Umber (maroon). 

Every STAX. collection also includes a range of sizes starting from XXS up to 4XL.

Customers can look chic in the new activewear ahead of a workout or while on the go. 

The Married At First Sight star and her partner Michael Brunelli (left) welcomed their first son Lucius into the world last February

The Married At First Sight star and her partner Michael Brunelli (left) welcomed their first son Lucius into the world last February

The latest drop features its best-selling seamless pieces in new colourways

The latest drop features its best-selling seamless pieces in new colourways

Another best-selling product is the ‘Zip Jacket’ (pictured) designed with 'buttery' NANDEX material

Another best-selling product is the 'Zip Jacket' (pictured) designed with 'buttery' NANDEX material 

STAX. launched in 2015 by Don Robertson and wife Matilda Murray and has gone from strength to strength in recent years - but the couple had to push past financial hardship at first. 

In 2012 it started off as a protein bars business dubbed 'Muscle Stax' and Don would sell the products at the gym he worked at - but when the sports club became bankrupt he lost 'everything'.

'We couldn't get back into the gym and the stock was seized, which left me in $80,000 worth of debt,' he previously told FEMAIL.

Since then, the business has pivoted to fashion and has gained a mass following, capturing the attention of celebrities, including actress Jennifer Lopez, singer Rita Ora and singer Lizzo.

To shop the sale, click here