Porto Bottom
Porto Bottom
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Description
Description
The Porto Bottom exudes effortless sophistication, highlighted by a stylish twisted side detail. Designed with a flattering high-waist fit, it’s the ultimate versatile piece for all your beach day adventures.
Twisted Side: Add a stylish touch.
High Leg Cut: Elongates the legs for a flattering appearance.
Medium Back Coverage: Offers a contemporary look.
Double Lined: To avoid any sheerness when wet.
Fabric
Fabric
Crafted from our signature recycled polyamide: 78% recycled nylon and 22% elastane.
- Chlorine resistant
- UV protective fabric
- Excellent coverage
- Bi-elastic
- Pilling resistance
Fit & Sizing
Fit & Sizing
Runs true to size. For more information please visit our size guide In between sizes? We recommend sizing up.
Amal is wearing size L.
Carlijn is wearing size M.
Care Instructions
Care Instructions
To preserve the quality and longevity of your Billie Swim: Hand wash in cold water, lay flat to dry indoors and away from direct sunlight.
Drop a hint
This bottom part in combination with the Bari top is an absolute winner this summer. Love the classy yet quirky fit and I feel really great in it. Same as the top, the bottom dries really fast, which I love.
I bought the combination with the black & white top. I love it :) the bottom has a nice touch with the white and turned part on the left. The fitting is good and stays in place while walking and swimming.













Billie Swim pieces are timless, high quality and designed to last
Billie Swim is a slow fashion brand, our thoughtful designs transcend trends. We focus on creating pieces for endless seasons of beachside elegance.

We only use reycled polyamide
Billie Swim pieces are only made of polyamide from recycled sources. We are proud that we do not use any conventional polyamide in our swimwear collections.
Our swimwear fabric is versatile, hyper-resistant, sleek, elegant, stretchy, soft, and breathable.

We understand science
All materials used are OEKO-TEX® Standard 100 certified. EKO-TEX® Standard 100 is a globally recognized certification that ensures textiles are free from harmful substances.

Billie Swim is produced at a solar powered factory
Billie Swim suits are produced in Indonesia. The factory producing our collection is solar powered.
Fun fact: 90 seconds of sunlight = 2.5 hours of power for sewing machine = 1 Billie swim bikini set.
Let's make waves together
By choosing Billie Swim, you're not just buying swimwear — you're joining a movement towards slow fashion, high quality goods that are designed to last.