Women Rash Guard | The Sumba

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'Super comfy, adjustable front zip when surfing.'

Color: Midnight

Size: XXS

Only 8 left!

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Ships in 24 hours.
  • Unbelievably comfortable, this cropped women rash guard is your new partner in crime.
  • Sustainable and stylish, mesh details on the side complement the flattering cut of this comfy cropped women's rash guard.
  • Made from silky soft yet durable UPF 50 Italian Econyl, this rash guard surf suit is both slimming and stretchy and provides protection from the sun's harmful rays.

Thumbholes lock the sleeves in place for your fast-paced adventures, while the full front-zip allows for a personalised fit. 

Gear up for a day in the sun with this eco-friendly cropped women rash guard. Flattering and functional, the Sumba women's rashguard is inspired by our signature Sulawesi & Mentawai styles, making it the ultimate surf suit for women.

Surf bathing suits for women: our super strong stitching stands up to even the toughest sun and surf, so you can stay out all day, every day.

It matches perfectly with our sustainable bikini's - The Sumba High Waisted bikini bottoms and Aceh bikini bottoms.

Read more about ECONYL, the sustainable fabric we use in all our swimwear.

Twelve month warranty from the date of purchase.

Head to our to find your perfect fit.

Model in video is a size 10 AU and is wearing size S.

Fits true to size. If in between sizes and buying the Midnight, go up a size.

UPF 50+ Powerful sun protection to keep your skin safe from the sun.

Sustainable luxurious Italian fabric - will last twice as long as your regular rash guard.

Thumbholes for added sun protection.

Durably Designed with smooth strong stitching.

Sleek, snug fit; perfect for any sport

Full front zipper; for easy on and off and adjustable bust; go from sporty to sexy.

Soft and stretchy; Smooth and silky to the touch.

Ethically manufactured in Bali with fair pay to workers.


Worldwide shipping from Bali & Australia. Free Shipping for orders $200+.

Regular International parcels take approximately 3 weeks. Express shipping option available at checkout for $25 AUD.

Please read more of our Shipping Policy here.


We accept exchanges or returns for change of mind, as long as it is processed within 14 days.

Please follow instructions on our Returns page.


We stand by the quality of our swimsuits, they are tailor made with high quality Italian fabric.

We offer a 12 month warranty from date of purchase, shall the make, material or hardware malfunction.

Read more about our warranty here.

To keep your swimwear happy and healthy, please follow our general care guidelines:

Our suits are happiest when hand-washed separately in cool water so the colours do not bleed. Please avoid traditional washers and abrasive materials like velcro and bleach. Do not leave wet swimsuit in a bag. Air dry in a shady spot.

Have a question? You can reach us below or on live chat.


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Recycled Materials
UPF 50+ Protection
Luxuriously Soft Fabric
Made With Love

Customer Reviews

Based on 12 reviews
Meredith Schwartz

I am very happy with this bikini , the size match perfectly !!

Lise Sauca (Zurich, CH)
Best swimwear ever <3

I absolutely love 'The Sumba' bikini top! The white color is so chic, and the long sleeves provide great sun protection while still looking stylish :-) The fit is perfect, and the quality of the material feels durable and comfortable. Definitely my new favorite swimwear piece! 🤍

Beautiful, flattering top!

So comfy & the perfect fit! Love this top & the matching bottoms, I got lots of compliments on my recent trip! Wore the set surfing & loved it!

Paige Taylor (Sedona, US)
Great fit

This top fits perfect! I haven’t got to wear it yet but can’t wait to use it for free diving! Sleeves are long enough to comfortably use thumb holes too!

Still ny number one

It was my first two-piece from OSB & I love it like the first day! Fits, fits perfectly and nothing slips! A dream.

Perfect two piece cut

Our two piece bikinis are made with a luxurious sustainable buttery soft fabric. 
They are the perfect intersection of sporty and fashionable.  With a comfortable seamless design, both functional and flattering and a tailored feminine design that is suitable for leisure or athletic activities.

Designed for comfort

We’ve designed our swimsuits for comfort right down to the smallest detail. The luxuriously soft fabric, double lined, with innovative cupless support and smooth seams will hold you in and support you, with all your water activities.

Sustainable Swim

We value slow fashion over fast with a focus on sustainable fabrics and ethical production. Crafted from regenerated nylon that is designed to last twice as long as your regular swimsuit. Our swimwear is designed & made in Bali with love, with 10% of each sale donated to those in need through our Giving Back initiative.


All of our swimsuits are double lined and a firm fit so you don't need padding for support.

The sumatra high waisted bikini bottom provides the most coverage on your bottom. The sumba high rise bikini is the next best for bottom coverage.

The Bali Bikini and Banyak bikini top is a smaller cut, designed to be firm so it doesn't move when being active. If you prefer a more relaxed fee, size up and if in between go up two sizes.

All of our snow white seamless bikinis, crop top bikinis and crop rash guards are lined with beige econyl sustainable fabric to prevent them from going transparent when wet.

The Sumatra and the Sumba bikini provide the most coverage and support for your tummy.

Yes all of our bikinis are made with a seamless stitch so they don't dig in to your skin.