Lotta Ludwigson and Remei Launch Fully Traceable Organic Cotton Luma T-Shirt Collection

Most brands throwing around the word "traceable" mean they know which country their cotton came from. Berlin slow fashion label Lotta Ludwigson and Swiss textile producer Remei AG went further: their new Luma T-shirt capsule links, via a QR code on the hangtag, to my-trace.ch, where you can see which specific field and which farming family produced the organic cotton before it became your shirt.

The collection, which went on sale March 18 and was formally announced March 19, is built on Remei's direct partnerships with smallholder farmers in India and Tanzania, relationships the Swiss company has maintained for over 30 years. Those farmers operate under guaranteed purchase agreements and receive a premium of 15 percent above the local market price for their cotton, terms that put real structural weight behind the traceability claims.

The construction details reinforce the longevity argument. The fabric is a midweight single jersey at 190 g/m², with stripes formed in the yarn before the fabric is set rather than applied to the surface afterward. That process delivers colour permanence that dyed-on-top treatments simply cannot match over repeated washing. Ribbed collars and cuffs come in contrasting tones, with orange, green, or pink depending on the variant. The navy-white striped version with orange contrast collar and cuffs is the standout. Every component, including the yarn and labels, is mono-material, packaging is plastic-free, and the garment is designed to be returned and kept in circulation.

Five versions are available: plain white and plain black at 65 euros each, and striped in Royal Blue, Navy Blue, or Abbey Stone at 75 euros. Delivery covers all EU countries and Switzerland through the Lotta Ludwigson online shop.

Remei co-managing director Marion Röttges framed the collaboration plainly: "We are combining 30 years of experience with Lotta Ludwigson's circular fashion approach. Remei provides the transparency, Lotta Ludwigson the emotion. Together, we show that aesthetics and responsibility are not opposites." Charlotte Piller, founder of Lotta Ludwigson, called it proof that supply chain integrity can cross borders and company sizes: "This collaboration shows how shared values can have an impact across generations, company sizes and national borders, and how important strong partnerships are on the path to a sustainable fashion industry."

Remei also implements living wage initiatives and CO₂ insetting across its supply chains, and the company's small-batch production capability, with a minimum order quantity of 30 pieces, means the Luma model is replicable for other independent labels without requiring the volumes that typically make ethical sourcing prohibitive.

The Luma capsule is being positioned as a pilot project, a proof of concept that mono-material circular construction and seed-level traceability can coexist with the kind of considered design that actually sells. Whether it converts into a larger production run will depend on consumer uptake, but the infrastructure Remei has built over three decades makes scaling a genuine option rather than a talking point.