Join The Slow Fashion Movement
Slow fashion isn’t just a movement it’s a mindset. At String Nix, it guides everything we create. From the first stitch to the final touch, every thong is designed to last, made from certified sustainable materials, and crafted with the precision and integrity that true luxury demands.
In a landscape cluttered with fleeting trends and disposable fashion, String Nix set out on a daring mission to redefine how women experience lingerie. Born from the belief that true luxury should never compromise on ethics or comfort, our vision was simple to create sustainable, high-quality underwear for the modern, socially conscious woman.
We wanted to design something completely new: pieces that feel as good as they look, combining practicality with indulgence. Undies that are enduring, elegant, and sustainable. We knew there had to be a way to blend high-end craftsmanship with uncompromising ethical standards, and we were determined to lead that change.
Every String Nix string thong embodies the essence of slow fashion, thoughtful design, exceptional quality, and mindful production. We work with GOTS-certified organic cotton and GRS-certified recycled materials to ensure every piece meets the highest global standards for environmental and social responsibility. Our thongs are made in small batches to reduce waste, each one crafted to last, to move beautifully with the body, and to make women feel effortlessly confident.
Slow fashion has to start somewhere, and there’s no better place than with the basics…at the bottom. It’s where comfort meets consciousness and where change begins, one perfectly fitting thong at a time.
For us, sustainability extends beyond fabric. It’s about creating something that endures timeless design, minimal impact, and a conscious choice that supports women and the planet. From our recycled elastic to our FSC-certified packaging, every detail reflects a commitment to do better.
String Nix represents more than lingerie. It’s a celebration of mindful design, lasting comfort, and a new kind of everyday luxury. because true luxury transcends the ordinary and transforms the future.
Let customers speak for us
Amazing fit, I would definitely recommend!! ❤️
These knickers are made from certified organic cotton and you can really feel the difference, super soft, breathable, and kind to my skin. The fit is amazing even after washing, I’d definitely recommend!! ❤️
Natalie C
Organic Cotton String Thong White
Amazing quality and fit!
I was so surprised by our comfortable these are! It’s been so tricky to find knickers that actually sit right and are comfortable - there are spot on. The sizing is well done, and the quality is amazing. All round a great product!
Filipa
Organic Cotton String Thong Caramel
A new level of comfort
I’ve got two pairs in different colours - these are the best knickers I’ve got by a long shot. They’re so comfortable, the size fits perfectly and you can feel the fabric quality. I will definitely get more!
Filipa
Organic Cotton String Thong Black
Best String Thong Undies On the Market!
The Almond thong in an 8 is a great fit and true to size, really comfortable and lovely soft material . I’ve been looking for something like this for ages and I’m so glad I found it.
Sally B.
Organic Cotton String Thong Almond
Amazing pants!
I’ve tried countless undies brands over the years, including some of the big names, and nothing comes close in terms of comfort, fit, and quality.
The organic cotton is lovely and soft without being flimsy, and the recycled elastic, (didn’t even know that was a thing) gives the right amount of support without cutting in.
I like that String Nix is built around everyday luxury essentials. It doesn’t feel like it’s trying too hard, it just is better.
No fast-fashion rubbish just beautifully made Nix and I’ve already recommended them to friends. I’ll be buying more, they are a game-changer.
Lozzzzzurrr
Organic Cotton String Thong Chocolate
So happy to wear them❤️Absolutely love them❤️
I really like this product, they are extremely comfortable and don’t have any VPL at all. Can’t recommend enough, thank you.
Yuna
Organic Cotton String Thong Black
Super, luxurious and comfortable!!
Cannot recommend enough! They wash extremely well, keep their shape and I’m loving them, they are great under fitted trousers/skirts with their seamless look and are super soft
Nicky Peters
Organic Cotton String Thong Black
Environmentally conscious
Made with certified organic cotton which is super soft and extremely comfortable to wear.
They are easy to wash and I also put mine to dry in the tumble dryer on a gentle heat, even though it advises you not to tumble dryer them, they were fine, no shrinkage. Highly recommended.
Debbie
Organic Cotton String Thong Cinnamon
Comfortable and Eco friendly
I was hesitant to try a new brand of string thong after years of searching for the perfect one, but Stringnix changed my mind. Made from organic cotton and recycled materials, it’s both eco-friendly and incredibly comfortable. It’s also ideal for Pilates and running, offering a seamless, no-VPL fit. I’d recommend sizing down, as the fit is quite generous, especially at the front.
Caroline Dingwall
Organic Cotton String Thong Black
Classy!
Great classy knickers, super comfy and top quality. Going to buy every color !
W.R.
Organic Cotton String Thong Caramel
Excellent
I love my Nix, the quality is amazing and so comfortable.
L.A.
Organic Cotton String Thong Black