REPREVE®
Yarn made from recycled PET bottles. A bikini made from REPREVE® fabric contains around 13 bottles, giving them a second life.
For our bikinis made from REPREVE® fabric
Sustainability at MAIN
We make swimwear for real summers: recycled fabrics, small batches, and pieces you'll wear for a long time. Here, we openly show you what we use—and where.
The Cycle
PET bottles and nylon waste are collected instead of ending up in the trash or in the ocean.
The waste is cleaned and recycled into new yarn – REPREVE® from PET, ECONYL® from nylon.
The yarn is spun into soft, shape-retaining swimwear fabrics that offer plenty of stretch.
Designed in Switzerland, sewn in Bali – and made for many summers with you.
Our materials
Not every product is made of the same material. That’s why we state what each fabric is used for.
Yarn made from recycled PET bottles. A bikini made from REPREVE® fabric contains around 13 bottles, giving them a second life.
For our bikinis made from REPREVE® fabric
ECONYL® produces regenerated nylon yarn from nylon waste. This is woven into the Vita fabric that we use for selected models.
With our Vita fabric models
Organic cotton – soft on the skin and comfortable after bathing.
For selected cotton products
Some of our cotton products are OEKO-TEX® certified, meaning they have been tested for harmful substances. Not every product has the same certification – we indicate it where applicable.
On selected towels and cotton products
For selected items, we use viscose from the LENZING™ ECOVERO™ brand. According to the manufacturer, the fibers are derived from wood from certified sources.
On selected resort pieces
Fabric scraps from production don't end up in the trash with us: We sew scrunchies from them – to match your bikini.
With our scrunchies
Made in Bali
We design in Switzerland and have small batches produced in family-run businesses in Bali. This way, we only produce what we need – instead of large quantities in stock.
We are guided by the ETI Base Code. For us, this means:
Packaging
Your order arrives plastic-free. We use:
Wear longer
The most sustainable piece is a favorite that lasts a long time. That’s why many of our styles are adjustable or reversible and stay securely in place even when you’re moving.
How to make your swimwear last longer:
For the sea
The ocean is the reason MAIN exists. That is why we use a portion of our online sales to support the Healthy Seas initiative, which works towards cleaner oceans and removes lost fishing nets from the water.
Who we are
MAIN Design is a small, independent label from Switzerland. We design swimwear for women and children that fits well, lasts a long time, and is made with care – crafted in small family businesses on Bali.
Discover swimwear made from recycled fabrics – designed for movement and many summers to come.









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We design for women who chase waves, raise tiny humans, and believe in second chances — for themselves and the planet.
MAIN Design exists to remind you that confidence looks good on every body.
Because feeling good shouldn’t cost the planet.
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