MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set
MASA Cotton Bikini Set

MASA Cotton Bikini Set

$158.00
Description

Made in Greece using revolutionary weaving technology, our 100% cotton swimsuits offer exceptional stretch, quick drying, and complete freedom from synthetic plastic fibers. Designed in a timeless style, these reef-safe swimsuits are dyed in rich, sun-kissed hues that complement healthy, seed oil-free skin—so you can soak up the sun without also soaking toxic plastic. Heads-up: swimsuits are not chlorine safe.

Features

Naturally breathable & stretchy – Enjoy a perfect fit without synthetic fibers.
Fast-drying cotton – No more heavy, waterlogged swimwear.
Adjustable fit – String bikinis for a customizable and comfortable wear.
✔ Certified Safe – OEKO-TEX Standard 100 ensures swimsuits are free from harmful substances, including toxic dyes.

Size Chart
How to Measure
Return Policy

For safety reasons, we do not accept returns or exchanges on swimwear. 

Model Details

Model Heights: XS: 5'11", S: 5'11", M: 5'11", L: 5'9½", XL: 5'8"

Please check the Size Chart and How to Measure before ordering. Model sizing is indicated in the bottom right corner of each photo.

MASA Cotton Bikini Set Cherry / XS

Why Cotton Swimsuits?

Most women’s swimwear is made of hormone-disrupting plastics like polyamide and nylon, which your skin readily absorbs in the salty sea and summer heat. And while natural fabrics may be the grass fed tallow of clothing, there are two things they don’t do well— stretch and dry fast.

While tanning au naturel might work some of the time, a healthy sun enthusiast needs a natural swimsuit to match.

Since we couldn't bear the thought of beautiful seed oil-free skin sitting in plastic all summer long, we decided to take matters into our own hands. And like the chips we’re famous for, we had to do so without compromise.

That’s why we’ve partnered with Pepper Vally, one of the most innovative textile shops in Europe, to bring you the first completely natural fabric swimsuit.

Their proprietary method of weaving pure cotton threads makes fabric that is stretchy, durable, and fast drying. It also maintains its shape (unlike knit swimwear), giving you everything you want in a swimsuit, and nothing you don’t:

✅ Stretchy, durable, and fast drying
✅ Made from 100% OEKO-TEX® Standard 100 cotton

✅ Free of toxic dyes
✅ Actually looks good

If you’ve been searching for a natural fabric swimsuit, look no further— you don’t have to wear toxic plastic swimwear while soaking up the sun this summer!

How It’s Made

We call our swimsuits 100% cotton—and we stand by it. But unlike other brands, we believe in being upfront about what that actually means.

According to U.S. law, a product labeled 100% cotton can include small amounts of non-cotton components without the need for disclosure, typically in trims and structural elements (think a plastic button in a denim jacket). 

While the legal limit is up to 3% in the US, our swimsuits contain no more than 1.8% non-cotton materials total, which include natural rubber (which comes from trees) for structure throughout the main fabric, and a small amount of elastane (which is synthetic) in the elastic bands around the arm/leg holes—never in the main fabric.

These elastic bands are only necessary since natural rubber is sadly not durable enough to keep the shape of the edges intact after repeated use. But unlike most brands, where exposed elastic touches your skin (think the elastic waistband in men’s boxers), ours is fully wrapped in the cotton weave, meaning only cotton ever comes in contact with your body.

Other brands won’t tell you this. We will—because transparency matters.

4.8
Rated 4.8 out of 5 stars
Based on 25 reviews
Total 5 star reviews: 23 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
Slide 1 selected
25 reviews
  • N
    Natalie
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    7 minutes ago
    Very Nice Material!

    I have wanted this non toxic cotton bikini since MASA first posted about it, but was nervous to order because I didn't want to get the wrong size with no returns. I debated between small and medium for a long time, I am technically small based on the chart, but borderline medium. I am 5'3", athletic build, 120 pounds, 34 inch bust, 27 inch waist, and 37 inch hips. I settled on small based on the other reviews and knowing it's a stretchy material. Glad I did, I think medium would've been too loose. It's not a perfect fit but it's workable, the small top is a tad snug on my chest/underarm area, but not too bad and I think a medium would've been too loose in the back strap and the cup area as the cup seam is a little low cut. The bottoms are definitely cheeky, but I like that for laying in the sun, I want as much skin exposed as possible without it being a thong, I will mostly wear this at home anyway. It's a really flattering cut on the bottoms in the front and back, and the way you can adjust the tightness with the ties without it falling off is nice! Overall it's very well made and high quality, well worth the price, a steal considering plastic swimwear that pills fast often costs much more. So glad to not have to wear plastic swimwear anymore! Great customer service from MASA!

  • B
    Brittany
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Fits so well!!!

  • E
    Elizabeth
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    5 Stars

    I love this swimsuit! I am 5’ 7”, 150 lbs and got a small and it fits perfectly. The straps are on the long side, and the suit overall has decent coverage - a little cheeky, but not bad! I almost went with a medium but i am so glad i went with this small because it is incredibly stretchy. I messaged Mia regarding sizing questions and she was so helpful. I love having the peace of mind while swimming knowing that my suit is plastic free!

{"statementLink":"","footerHtml":"","hideMobile":true,"hideTrigger":true,"disableBgProcess":false,"language":"en","position":"left","leadColor":"#e9886b","triggerColor":"#e9886b","triggerRadius":"50%","triggerPositionX":"left","triggerPositionY":"bottom","triggerIcon":"settings","triggerSize":"medium","triggerOffsetX":0,"triggerOffsetY":0,"mobile":{"triggerSize":"medium","triggerPositionX":"right","triggerPositionY":"bottom","triggerOffsetX":20,"triggerOffsetY":60,"triggerRadius":"50%"}}