The Rise of Sustainable Luxury

At String Nix, we are redefining what sustainable luxury lingerie means.

Our collection of organic cotton g string thongs combines modern design, ethical craftsmanship, and exceptional comfort to create timeless pieces that feel as good as they look. As a UK-based ethical lingerie brand, we believe every woman deserves underwear that supports her body beautifully while supporting a better future for the planet.

Discover the next generation of eco-friendly underwear, designed to last and made to love. Sustainability is no longer a niche movement; it is the foundation of a modern, conscious lifestyle. At String Nix, we believe true luxury lies in creating beautiful lingerie that honours both the body and the planet.

Our string thong underwear is crafted from certified organic cotton and recycled materials, designed to look and feel exquisite while reducing environmental impact. As women increasingly seek brands that align with their values, the conversation around sustainable underwear has evolved. It’s not just about fabric, it’s about respect. Respect for your body, for the women who make your clothes, and for the environment that sustains us all.

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white branded gift boxes with cinnamon coloured string thong underwear

Sustainable Never Looked This Good

The fashion industry has long been associated with waste, overproduction, and synthetic materials that harm both people and the planet. String Nix was created to challenge that cycle. Our approach is different, intentional, considered, and built to last. Each piece is made from GOTS-certified organic cotton, ensuring purity and softness against your skin, and recycled elastic, offering a long-lasting fit without compromise.
When you choose sustainable lingerie, you are investing in quality that lasts longer, feels better, and supports ethical manufacturing. It’s a small change with a powerful impact, proof that style and sustainability can coexist beautifully.

Designed to Last, Made to Love

Fast fashion may thrive on disposability, but we believe true luxury should endure. Our organic cotton string thongs are made with longevity in mind, from their precision stitching to their breathable, resilient fabric. They maintain their shape and softness wash after wash, making them a meaningful investment in both comfort and conscience.


We encourage mindful care, washing in cold water, using eco-friendly detergent, and air drying, to preserve the integrity of every pair. The longer your String Nix lasts, the more sustainable your wardrobe becomes.

String Nix seamless thong underwear in assorted neutral shades, with sustainability tags, displayed on a magazine and fabric surface

The Beauty of Ethical Craftsmanship

Behind every String Nix g string thong is a commitment to transparency and fairness. Our manufacturing partners uphold ethical labour practices, ensuring that every person involved in production is treated with dignity and respect. From design to delivery, we are proud to operate with integrity because luxury should never come at the expense of others.

An Inclusive Vision of Sustainable Luxury

Sustainability isn’t one-size-fits-all. It’s inclusive, just like the women we design for. Our string thong underwear is available in a range of sizes from UK 8–18 and in six flattering skin tone shades Black, White, Almond, Caramel, Cinnamon, and Chocolate crafted to blend seamlessly with every complexion. We believe that when women feel comfortable and confident, they make better choices for themselves and for the planet.

A Conscious Future

Every purchase from String Nix is more than a wardrobe choice it is a statement. A decision to support artisans, quality, and ethical progress. As the world of fashion continues to evolve, we remain dedicated to shaping a future where sustainability is not an afterthought, but the standard.