Lotta Ludwigson: The LUMA Principle
The LUMA’s hangtag carries a QR code that leads to my-trace.ch. There, the journey of this T-shirt is fully documented: which field, which farming family in India or Tanzania, which production path from raw material to finished garment. The cotton comes exclusively from smallholder farming families with whom Remei has built long-term partnerships through guaranteed purchase agreements and a premium of 15 percent above the local market price.
The fabric is woven from a midweight single jersey, 190 g/m², the stripes formed in the yarn before the fabric is set — which explains why the colour achieves a permanence that surface-treated materials cannot. Ribbed collar and cuffs in contrasting tones, in orange, green or pink, give each variant its own character. Plastic-free packaging, ethically produced, designed for longevity.
The Lotta Ludwigson LUMA Bio-Circular T-Shirt — yarn-dyed, fully traceable, developed in cooperation with Remei (left). Styled with the ALVA wide-leg trousers and blazer in tangerine red and the SILKY BEIGE silk foulard (right). | Photo: Lotta Ludwigson
Crafted to Last
The fabric is woven from a midweight single jersey, 190 g/m², the stripes formed in the yarn before the fabric is set, which explains why the colour achieves a permanence that surface-treated materials cannot. Ribbed collar and cuffs in contrasting tones, in orange, green or pink, give each variant its own character — the T-shirt is plastic-free packaged, ethically produced, and designed for longevity.
It was an observation at a UN conference that stayed with Charlotte Piller, founder of the Lotta Ludwigson brand. A speaker wore a suit from a fashion label not known for fair production — that contradiction became the starting point. What followed were eighteen months of intensive development: the first fully bio-circular women’s suit, from the corozo button to the biodegradable shoulder pad, every component named and traceable. “We have learned that speed in this context is not progress,” says Piller. “If you want to create something that lasts, you have to accept that it takes time.” The LUMA T-shirt follows the same logic — for the garment one wears most often, buys most quickly, and questions least.
From fibre to packaging, the Lotta Ludwigson brand names every partner, every atelier, every material source. What the EU is still planning with the digital product passport, the brand is already practising. “We want to create fashion that people keep because it is valuable,” says Charlotte Piller. With the LUMA, that ambition has arrived in everyday life.
The LUMA Organic Cotton T-Shirt is now available at Lotta Ludwigson. lottaludwigson.com
For the portrait of Charlotte Piller: Lotta Ludwigson: Slow Luxury for Conscious Women
Everything You Need to Know About the Lotta Ludwigson LUMA T-Shirt
The LUMA is Lotta Ludwigson’s first T-shirt — bio-circular, yarn-dyed and fully traceable from seed to finished garment. Here are the most important questions about the material, the supply chain, and the people behind it.
The LUMA is the first T-shirt from the Lotta Ludwigson brand, developed by founder Charlotte Piller in cooperation with Swiss textile specialist Remei. Made from 100 percent certified organic cotton, yarn-dyed and fully traceable via my-trace.ch — from the seed to the finished garment.
The cotton comes exclusively from smallholder farming families in Tanzania and India, working with Remei through long-term partnerships. Farmers receive guaranteed purchase agreements and a premium of 15 percent above the local market price. The seeds are non-GMO.
Yarn-dyed means the colour is applied to the yarn before the fabric is woven. The result is a colour permanence that surface-treated fabrics cannot achieve.
The QR code on the hangtag leads to my-trace.ch, where the complete production journey is documented — from the seed to the finished garment.
The plain models in white and black are available for €65, the striped versions for €75. All models are plastic-free packaged and designed for longevity.
Charlotte Piller makes transparency a design principle of the Lotta Ludwigson brand — not as a promise, but as verifiable documentation. What the EU is still planning with the digital product passport, the brand is already practising.
