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£3.95 UK shipping or FREE over £90.
We ship worldwide. Rates are calculated at checkout.
Designed to hug your curves and flatter your waist. The Prana Onepiece features medium bum coverage and an adjustable tie-back. Made with our buttery soft, recycled fabric.
Please check our sizing page to find your best fit. For personalised help, chat to an expert by emailing support@instantswimwear.com
Yes! We ship worldwide, and you'll be able to track your order to your door.
All of our swimsuits are designed for training! Every piece is chlorine-resistant, but our Longevity suits are the most durable.
We have a super easy returns and exchange process, using our online returns portal. All returns & exchanges must be submitted within 14 days.
Overall rating: 4.9 / 5 from 64 reviews.
Love the fit it’s very flattering and I get loads of compliments asking me where my swimsuit is from. I am a size 8 petite but I ordered the L in this one, (as my bust is DD) the back is adjustable so ensures the best fit and great when doing lengths in my local pool. Thank you x
I was surprised how supportive this swimsuit is. Comfortable to swim in and stays in place. I ordered a 32 to ensure enough length in the body as I would normally order a tall.
The best fitting costume 💕
My favourite ever swimsuit 💕
Love this swimsuit, super flattering! Love that I can adjust the straps at the back!
Every time I try a new Instant Swim swimming costume it's my new favourite! And latest is this one! Aside from the absolutely gorgeous colour it is equally flattering and comfortable. Didn't budge at all while I swam and tumble turned for 2 miles, and along with my Instant Swim swimming cap, it made me feel like I was gliding through the water! The straps at the back are so pretty, but I love that you can also adjust them to find the right fit! Going straight to order this costume in another colour. Oh and the lifeguard I've had a crush on at the pool for ages actually spoke to me, I'm crediting the swimming costume, haha!
Love this costume!!! It’s so comfortable and fits so well!!
I am honestly obsessed. It’s so flattering, fits perfectly, and I love that it’s still practical for a long swim training session but also works for the beach! If you’re in between sizes you can size up - I think this fits slightly smaller than the Karma style and it’s relatively adjustable with the tie. So happy with it!
So flattering! Love the fabric and it’s supper comfortable for swimming
The fit is so comfortable and secure. I wore the Prana for a training session with Instant Swim Club at the London Aquatics Centre and I didn’t have to adjust it once. Love it!
My new favourite swimsuit! I get compliments wherever I swim wearing this one! It’s so comfortable, the colour is gorgeous, the back detail is stunning, I’m literally in love 💚
Gorgeous swimsuit, flattering comfortable fit and is great quality too. I’d highly recommend 😊
Amazing !
In LOVE! The swimsuit is such good quality, I don’t usually like one piece swimsuits but I will definitely be buying another :) 🤍
The most flattering fit, such a beautiful swimsuit, fits live a groove and so buttery soft!
Absolutely love this suit. Shipping was fast! Very comfortable for lap swimming, but stylish too. Will be ordering more. Ref: 5’4 150lbs
Store owner replied: Stunning!! Thank you Sarah xx
I’ve never had a swimsuit that fits as nice as this! Very practical and i would 100% recommend purchasing.
Store owner replied: Gorgeous! Thank you Jaz <3
This is my favorite style. Love the fit. Thank you for bringing in new colors.
Store owner replied: Thanks for your review! Looks amazing! x
Bien ajustado y Nudo fácil de hacer
This is my favorite style. I adore the fit. I wish it came in other colors.
Store owner replied: Stunning! More colours to come very soon! x
since the sizes don’t go past 14 I was a little concerned about it fitting - it is a little tight on me but not too uncomfortable and I really like the style. It would be great if they could extend the size range.
Store owner replied: Looks amazing! Thanks for your review Rosie x
Amazing, thick material. Snatches your waist
Store owner replied: Thanks for your review Astrid! Looks amazing on you :)
So pretty for both training and to take on holiday! Love it xx
It is super comfy and SO flattering! Obsessed!!!
I love everything about this costume!
Great material and high flexibility! Fantastic work!
Absolutely love the colour and the fit is so flattering also the logo on the back is a great addition xx
I love that this suit has ties that are low down on the back making it easier for my shoulders. The color is great and I like the coverage compared to other tie back suits.
Store owner replied: Hi Margaret, This is such a thoughtful review, thank you. We're so happy the low ties are kind to your shoulders and that the coverage feels right to you. Hearing this about the back design means a lot to us. M Instant Swim
I think this has to be my favourite swim suits of all time. The fit is perfect - I have always struggled with my body shape and swim suits fitting well. I was a little worried the thin straps would be uncomfortable or annoying (Neurodivergent over here) and I had no need to worry. It's so comfortable, and very easy to adjust tightness to preference. I couldn't be happier
Great swimsuit! 👌🏻🙂
Great swim suit! Super flattering, great colour and the back is super cute. But I wish they made it for tall girls/ girls with a longer torso like the Karma ones.
Top Quality and looks great
Fits amazing, very comfortable!
I really love this suit! It’s comfortable, cute and perfect for almost any situation.
I bought this for my daughter. She swims 7 sessions a week with a club and has a lot of swimsuits. She absolutely loved the Prana, the back ties are really fitted and the quality is excellent. This is now her favourite brand, looks amazing, she wore it this morning for a 2 hour training session and it was comfortable throughout. Also super quick delivery and lovely personal note included.
Super beau
Suit makes me feel amazing and confident, the material is so stretchy and thick it holds you in the right places. I love it
lovely colour, nice fit
Ottima vestibilità e materiale
Is this style being restocked? Would love to buy it!
Store owner replied: Hey Kearsy! Yes it will be restocked next month, with new colours coming soon too! x
