Thermore Turns Textile Waste Into Warmth With New T2T Insulation

The outdoor industry spent decades congratulating itself for turning plastic bottles into jacket fill. Thermore, the Milan-based thermal insulation specialist, has moved the argument forward: its newly launched Ecodown Fibers T2T takes the scraps from textile production itself and converts them into performance-grade insulation, closing a loop that bottle-to-fiber recycling never quite managed.

Announced on March 11, 2026, Ecodown Fibers T2T is a free-fiber, loose-fill insulation composed entirely of recycled polyester: 80% post-industrial textile scrap sourced from within the apparel supply chain and 20% post-consumer PET bottles. The T2T designation stands for textile-to-textile, a framing Thermore uses deliberately to distinguish the product from conventional textile recovery, which typically yields lower-performance outputs destined for insulation batts, wiping cloths or landfill. "Unlike the downcycling that typically characterizes textile recovery," the company stated at launch, "Ecodown Fibers T2T stands apart by delivering the same high quality of other Thermore products."

That quality benchmark matters commercially. Thermore has spent more than 50 years supplying thermal insulation to fashion and outdoor brands, and its client roster includes EA7 Emporio Armani (a technical partner on its Ecodown Fibers Genius product), Paul & Shark, Bogner Sport, Zegna Sport and Nike. A product that cannot perform alongside those partnerships has no path to adoption. The company claims Ecodown Fibers T2T delivers high loft, softness and resistance to clumping over time, though no independent lab metrics, fill-power equivalents or thermal resistance values have been released alongside the launch.

Managing director Patrizio Siniscalchi framed the launch as the culmination of sustained internal research rather than a reactive pivot toward sustainability credentials. "I have personally coordinated the Thermore research group for years and the theme of circularity and textile-to-textile has long been the subject of study by our team," he said. "In fact, just as we pioneered the use of recycled fibres from PET bottles over 40 years ago, in recent years we have worked on the revaluation of textile waste. Ecodown Fibers T2T is already the second generation of padding we have produced using these important resources."

That historical reference carries weight. Thermore introduced its first recycled thermal insulation, made from PET bottles, in the early 1980s, well before recycled polyester became a standard sustainability talking point in apparel. The new T2T product represents the next generation of that trajectory: moving upstream from the recycling bin to the cutting room floor. The company's 2024 Invisiloft, developed specifically for high-performance sportswear applications, signals a parallel push beyond traditional outdoor categories.

Ecodown Fibers T2T is positioned as a drop-in replacement for fashion and sportswear brands seeking certified, performance-grade fill without virgin polyester, competing in a market that also includes natural alternatives such as wool and other recycled materials such as cellulose. Thermore manufactures across both the Far East and Europe and operates a global sales network, giving the product broad commercial reach. Whether named brand partners commit to T2T in production collections remains to be seen; no launch customers have been publicly confirmed.