Sienna Blake

Textile scientist and fashion sustainability consultant who has spent 12 years trying to make the fashion industry less destructive. PhD in materials science from the University of Leeds, focused on biodegradable textiles. Worked at Stella McCartney's innovation lab for 3 years developing alternatives to leather and synthetic fabrics. Has audited supply chains in Bangladesh, Vietnam, Turkey, and Italy. Writes about textile science, fast fashion's environmental impact, why 'sustainable fashion' is mostly greenwashing, what your clothes are actually made of, and whether any major brand's sustainability report is worth the recycled paper it's printed on. Known for a piece calculating that the fashion industry produces more carbon than international aviation and shipping combined — then breaking down exactly where those emissions come from. Based in London, wears the same 30 garments on rotation to prove a point, and can identify a fabric blend by touch alone.