Reviews
New favourite crop
"Absolutely been loving this sports bra. The top is so flattering and love the thin straps and cross back. It’s such good quality, comfortable to wear all day and holds up well during my workouts. Definitely going to be adding more colours to my collection"
— Jade (5/5, verified buyer, 29 October 2026)
Amazing quality!😍
"This is so supportive and comfortable. I love the fit and style!! I’m a 32B (US) and the size 6 is perfect"
— Madeleine (5/5, 28 October 2026)
The JOY!!
"Hi! I wear sports bras all day/every day, as breastfeeding for a long time made the girls a bit deflated and hard to make look nice in bras and tops with little support or coverage. I’m also very active and have lately been on a mission to find non-toxic plastic-free active wear, especially tops, to make sure I protect my body from micro plastics. I was SO excited to find merino tops and immediately purchased the cross back to wear all day ~ I got a size M (I’m a size 10/12/28” waist, if this helps) and it is very comfortable, sits very nicely on ~ no bounce ;)
The fabric is soft and firm, and there are no annoying tags or seams. The tops can be worn all day, and gives the girls a good shape without being too heavily padded (the padding is actually perfect! Not rec gen thin and flimsy and not lorna jane thick (for those who like vivid descriptions!))
Safe to say, I found my go to, and will now change out all my active wear from overpriced polyester and nylon, to skin friendly and supportive, natural, breathing, self cleaning (yes! Merino is magic!), safe and low-tox active wear ✨
Thank you so much for creating this brand!!
And if in doubt, I say, try it! Your body is worth it!
All the best,
Kari"
— Karianne P. (5/5, verified buyer, 20 October 2026)
Gorgeous indigo colour
"Love the simple cross back design! Comfortable enough to wear all day but supportive for exercising too."
— Demi (5/5, verified buyer, 14 October 2026)
Highly reccomend!
"I loveee the cocoa merino sports bra! The fit is spot on, I'm normally and 8 and the 8 fit. Good support, flattering fit and love the colour. Can't wait to get more!"
— Natalie L. (5/5, verified buyer, 9 October 2026)
Amazing Bra!
"Super supportive and love the cross back. The design is flawless and comfortable to wear all day. Highly recommend all of Estronis pieces as they never miss!! Love what they are doing and shipping is always so so fast."
— Real A. (5/5, 3 October 2026)
Best natural fibre sports bra on the market
"I wear it running, strength training and doing Pilates and it can be worn multiple times no worries. I’m in love."
— Chloe R. (5/5, verified buyer, 1 October 2026)
the best natural fibre crop!
"This sports bra is so nice. The scarlet red colour is stunning. It is super comfortable and doesn’t dig in anywhere. It provides good support and I’ve found the fabric is really breathable and also very soft!"
— Annabel (5/5, verified buyer, 22 September 2026)
So comfortable and flattering!
"I absolutely adore this top. I’m usually a size 6 and the size 6 for this cross back fits me perfectly! The indigo colour is stunning and versatile to wear with other bottoms I own. No digging into the skin, I could wear it all day. Great for movement and lounging. Soft material and supportive. Beautiful piece! I’d buy them in every colour"
— kristine c. (5/5, verified buyer, 21 September 2026)
Totally hooked!
"Such amazing fabric and a beautiful supportive crop!! Wore this in a heated room Pilates class and was so happy with how it worked with sweat - the top stayed so dry compared to other fabrics !!"
— Bec W. (5/5, verified buyer, 21 September 2026)
Obsessed!!
"just got this cross back sports bra in indigo blue and I love it!! it fits true to size and is super comfortable"
— Ally C. (5/5, 17 September 2026)
Beautiful fabric!
"Love the soft feel of this bra, it’s not itchy and it fits perfect with good coverage !"
— Alison (5/5, 16 September 2026)
Love it!
"I have been looking at this bra for ages and finally when I looked it was in stock in the sizes I wanted, so I did it. I love it, it’s so soft and doesn’t itch at all! I got a size 8 and found the size good, I was worried how it would sit as I’m a 10DD but it fits well! Will be buying more styles as I love that this is nearly all merino wool.
Thank you"
— Roxanne O. (5/5, verified buyer, 12 September 2026)
Really supportive
"These are snug and comfortable, really supportive for a thin strap bra. I haven’t done anything high impact but for walking and Pilates it’s been perfect"
— Elle (5/5, verified buyer, 10 September 2026)
The perfect sports bra!
"Seriously, no notes. I'm obsessed with the fit; perfect for low impact sports and walking/every day, I have the matching shorts and I constantly get complimented whenever I wear the set.
I’ve been wanting to move away from polyester activewear for ages but didn’t really know where to start, and now Estroni is my new go-to! Obsessed."
— Monika (5/5, 9 September 2026)
The BEST Sports bra ever
"I’m an Alo girl through and through…I searched far and wide for a polyester free substitute. Watched all the TikTok reviews, scoured the internet for the "best" alternatives. I settled on Estroni, and thank god I did. Fits so superbly, and looks amazing. Well worth the ££. Haven’t yet worked out in it, or worn it frequently, so might pop back here in a few months. If you’re on the fence, I would totally get off the fence and buy it."
— Isadora V. (5/5, verified buyer, 9 September 2026)
Comfy and suppportive
"Supportive and comfy in hot weather. Want to get a different color now!"
— B B. (5/5, verified buyer, 5 September 2026)
Good purchase!
"The fit and support is great even if they’re only thin straps at the back. It’s not buttery soft, but it’s soft enough as the majority of the material is made out of merino wool. Good purchase! More colors hopefully!"
— Eleanore G. (5/5, verified buyer, 1 September 2026)
Favorite heated outfit
"I love being able to wear natural fabric. I have been searching for a long time! I love the sport bra because I also use it as an everyday bra in this heat!"
— MaV (5/5, verified buyer, 24 August 2026)
Très joli coupe et couleur
"Taille très bien et bon maintien"
— Alexane B. (5/5, verified buyer, 23 August 2026)
Love the color ♥️
"Love the quality and was able to use it in my heated workout class! So good to not sweat in plastic and it dry so quickly! I should had sized up because it’s a little tight but still feel comfortable. I’ll order more but in size 6:"
— Ma B. (5/5, verified buyer, 20 August 2026)
My favourite bra ever
"Putting this bra on for the first time was a truly cosmic experience. I’m usually a size 8/10 and bra size 12B. I bought a size 10 and it’s snug but perfect for support. Could not be happier :)"
— Kristen H. (5/5, verified buyer, 18 August 2026)
Amazing fabric and fit
"The fabric is very soft and durable, padding is comfortable and it is true to size.
Will definitely buy more!"
— Maddie (5/5, verified buyer, 14 August 2026)
Very comfortable
"A great fit I'm a 12D and went the medium. Definitely only suited to low impact for bigger bust's but I still think its fabulous"
— Bree H. (5/5, verified buyer, 4 August 2026)
LOVE THIS CROP
"Estroni's peices are some of the best natural fibre activewear I have tried. I am so impressed with the fabric quality, it feels tight fitting yet soft to touch, it is thick yet breathable. The styles of the crop is also extemely flattering. I really really love this piece!"
— Serina N. (5/5, verified buyer, 28 July 2026)
Comfy
"Comfy fits to size feels refreshing to wear something that is good for your body"
— maya m. (5/5, verified buyer, 27 July 2026)
Perfect sports bra/bralette
"I will be wearing this everyday, healthy on the boobs and super comfortable."
— Ella C. (5/5, verified buyer, 24 July 2026)
Absolutely recommend this sports bra
"I love the look and feel of this sports bra. The indigo colour is amazing. Will definitely be purchasing again."
— Susanna B. (5/5, verified buyer, 19 July 2026)
So flattering!
"I love this sports bra so much! Especially the criss cross straps and the vibrant red. It is super supportive and doesn’t dig in. Sits beautifully on the body."
— Sophia (5/5, verified buyer, 19 July 2026)
Love it!
"Such a nice bra to be sweating in. Love the red colour it is gorgeous, and supportive. Also if just feels so comfortable soft and breathable for your skin."
— Andie (5/5, 18 July 2026)
look after the girls 🍒 and your pits chicks!! ❤️
"Obsessed! After having cancer in nearby lymph nodes next to where my bras sit, I have been looking everywhere for natural fibre sports bras for sweating in. I initially ordered from PACT but much prefer the fit of these merino wool ones :)"
— Soph (5/5, verified buyer, 16 July 2026)
Super supportive
"Super supportive bra, beautiful colour, perfect for all kinds of movement, will definitely be purchasing again!"
— Ingrid V. (5/5, verified buyer, 16 July 2026)
No sweat marks and natural fibre!
"Beautiful material, no change in quality wash after wash. No sweat marks, hot Pilates proof!!"
— Izzy (5/5, verified buyer, 25 June 2026)
100% recommended
"Universally flattering fit including wide, thick padding. Most padding in sports bras is too narrow, thin and triangular - this really makes a difference! It fits my small chest well and seems to have lots of give for larger busts. I ordered black and it is a true black."
— Marika H. (5/5, verified buyer, 22 May 2026)
Just received and very happy!
"I’ve tried a few different mostly cotton blend crops for exercise but this merino fabric is SO much better. It feels firmer in fit and therefore more supportive and the fabric is still super soft. I also avoid cross and race back styles because I find the straps dig in and annoy me but because of the natural
fabric these ones are comfy as. If these wash and wear well then I will never go back to anything else!"
— Lauren M. (5/5, verified buyer, 9 March 2026)
The best yet !!!
"I have fallen in love with this sports bra ! Very comfortable and supportive. The merino fabric is soft on the skin, breathable, and regulates temperature well during exercise. A great quality sports bra that feels comfortable to wear all day."
— Millie A. (5/5, 8 March 2026)
AMAZING!
"I'm beyond happy with the set that I got! I've been slowly getting rid of all my synthetic clothing, and finding activewear is the hardest part, especially with a nice fit and feel. This set absolutely exceeded my expectations, the fit is cute as, the merino is soft but sturdy, the colour is amazing! Absolutely love what you guys are doing, I'm telling everyone!"
— Layla L. (5/5, verified buyer, 2 March 2026)
Highly recommend
"Very, very happy with my crossback sports bra. I've worn it almost constantly since it arrived. I've found it comfortable, supportive, and breathable. I was worried it would be itchy but it has been fine.
My cleavage area is where I sweat the most and i love knowing I have all the properties of merino wool to protect me from feeling wet and stinky. I got the red colour, and it looks great. I foresee myself buying another one of these in the future."
— Anita (5/5, verified buyer, 1 February 2026)
LOVE!!!
"Absolutely love my tank and bike shorts, they feel and fit so nice on the skin and it makes me feel so snatched but also good to have such natural fabric against my skin while I’m training, sweating or just out and about! Thank you x"
— Mikaela B. (5/5, verified buyer, 31 January 2026)
Super duper comfy
"I love wearing this as an everyday bra actually and it’s great for when I decide last minute to do some exercise - I don’t have to change bras! 😍 would love to purchase in more colours"
— Kimi O. (5/5, verified buyer, 28 January 2026)
Super comfy and flattering
"Finally decided to bite the bullet, was hesitant to pay this amount for a sports bra but it is actually so much more comfortable than my polyester pieces and even better knowing my skin is not absorbing microplastics."
— Vivian (5/5, verified buyer, 25 January 2026)
Breathable and comfortable!
"These bras are beautiful, they are so comfortable, breathable and flattering"
— Rachel (5/5, verified buyer, 20 January 2026)
Love the set
"Obsessed with the feel and cut! We’re in the middle of summer now and the wool feels amazing, light and soft!"
— Shannen (5/5, 13 January 2026)
I love this sports bra!
"Love, love, love! The cut is so flattering! It comes down the perfect amount where you can still do downward facing dog without having to readjust. It’s super comfortable and I’m able to wear it all day as a 12D (wearing size M). I literally can’t fault this top 💕"
— Antigone C. (5/5, verified buyer, 6 January 2026)
Obsessed with this top!
"Obsessed with this top!! As someone who only wears natural fibre activewear, this top is perfect. I love the removable pads and the material is super soft."
— Katie (5/5, verified buyer, 24 December 2025)
Perfect for Summer
"Has been amazing for the Summer heat!! This has been keeping me cool rather than sticky and sweaty that I usually am at this time of year. Thank you!!!"
— Georgia (5/5, verified buyer, 20 December 2025)
Super comfy and great fit
"Love this bra! it’s so comfy and the merino material feels amazing and super soft. The cut and colour goes with everything - I’ll be wearing this all the time to the gym, yoga and coffee ☀️"
— Kate H. (5/5, 15 December 2025)
Feels so soft and organic
"Such a flattering fit, comfy on the body - doesn't dig in anywhere yet feels supportive. The merino wool feels really soft and somehow organic on the skin. I can see myself wearing merino instead of polyester in future."
— Hilary (5/5, verified buyer, 13 December 2025)
