About String Nix®
A refined everyday underwear brand built around one beautifully focused essential, the organic cotton string thong.
The String Nix string thong is a refined everyday essential, made from GOTS certified organic cotton and designed to feel soft, breathable, and barely there against skin. The fit is smooth, light, and discreet under real clothes, from linen trousers and tailoring to dresses, denim, and activewear.
String Nix is intentionally focused. We started with one hero product because we wanted to get it right. One string thong, six carefully chosen shades, Black, White, Almond, Caramel, Cinnamon, and Chocolate, created to offer classic options alongside 4 skin tone inspired shades for a more considered underwear drawer.
Every detail matters. The organic cotton. The recycled elastic. The smooth fit. The luxury monogrammed box. The way it feels when you put it on, and the way it disappears once you are dressed.
Our approach is simple, fewer pieces, made better. Instead of building a collection around constant newness, we focused on the piece women wear closest to skin and rely on most. It had to feel soft, sit beautifully, wash well, and work under the clothes women actually wear.
This is not underwear designed to be worn once and forgotten. It is underwear designed to become the pair you reach for first, the foundation that makes getting dressed feel easier, cleaner, and more comfortable.
String Nix is for women who want comfort without compromise, beautiful simplicity without excess, and a better everyday string thong that feels as good as it looks.
A Note From Our Founder
Founded by Carol Wiltshire, a Creative Director with a background in media and visual storytelling, String Nix is built on clarity rather than noise. Every choice is intentional, from the cut and colour palette to how the brand shows up.
I created String Nix because I wanted to bring back the kind of underwear I had relied on for years, simple, flattering, comfortable, and beautifully made. It was never just about how a thong looks under clothes. It was about the fabric against your skin, the way it feels all day, and the quiet confidence of knowing your underwear is doing exactly what it should. When I meet friends, they still want to tell me they are wearing String Nix. It is never prompted, just shared, and still one of my proudest moments.
Everyday luxury, thoughtfully made and confidently chosen.
Passionate About
Our Values
String Nix is built around one simple idea, underwear should feel beautiful, comfortable, and considered from the first wear. We believe in doing fewer things better, choosing quality materials, thoughtful design, and a smooth fit that works under the clothes women actually wear.
Each piece is made with GOTS certified organic cotton and recycled elastic, giving you softness against the skin, light support, and a more conscious choice without losing the refined simplicity that makes String Nix feel special.
Thoughtfully Made
Sustainability at String Nix is not an add on. It starts with the fabric, continues through the fit, and carries through to the packaging. Our organic cotton string thong underwear is designed to be worn, loved, washed, and reached for again.
We focus on better materials, lasting comfort, and a more intentional way to buy underwear. No excess. No overcomplication. Just beautifully made everyday string thongs, created with care for your skin, your wardrobe, and the world around us.