Championing social sustainability, Tengri sources rare yak fibres directly from a cooperative of nomadic yak herders in the Khangai region of Mongolia. Khangai yak fibre offers an ethical, regenerative alternative to cashmere, with superior natural properties and transparent provenance. The overgrazing of non-endemic species, such as cashmere goats, has contributed to desertification in the Mongolian Steppes, as the animals eat both the roots of the grasses and the flowers that seed new plants. In contrast, indigenous yaks tread more lightly on the ground and eat only the tips of the grass, encouraging biodiversity in the area. Pioneering ancient fibres and fabrics, Tengri operates a 100% transparent supply chain and fairshare business model, working to preserve remote landscapes, protect wildlife and support indigenous communities threatened by rapid industrialisation and land degradation. Innovating on undyed and 100% natural fibres, Khangai yak fabric is exquisitely soft, hypoallergenic, breathable and water- and odour-resistant. It is used in fashion and interiors, including upholstery fabrics, homeware, throws and blankets.