2026 SPEAKER

Brittany Sierra in

Brittany Sierra

Founder & CEO

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The Sustainable Fashion Forum, Green Behavior

Brittany Sierra is the founder of the Sustainable Fashion Forum and a leading voice on consumer behavior in sustainable fashion. Named a Vogue Business 100 Innovator, her work focuses on the gap between the systems the industry builds and whether people actually use them in practice.

Consumer Behavior
Adoption Strategy
Industry Analysis

Academic Background
Brittany’s work is grounded in a decade of independent research across consumer psychology, behavior change, and the fashion industry. Her perspective is shaped by extensive qualitative research, including interviews and ongoing conversations with brands, retailers, and industry leaders.
Industry Experience
Brittany is the founder of the Sustainable Fashion Forum, a platform known for bringing together leaders across fashion, technology, and sustainability for nuanced, industry-shaping conversations. She has also advised brands including Rothy’s and contributed to circularity initiatives with On Running, bringing a behavior-driven lens to sustainability strategy. Her work has informed conversations across brands, platforms, and industry organizations navigating the future of sustainable fashion.

Hear Brittany speak at SFF26

Join 400+ leaders from companies like

Pangaia
Nordstrom
AII
Vestiaire Collective
Adidas
VF Corp
Rothy's
cascale
everlane
eBay
Pangaia
Nordstrom
AII
Vestiaire Collective
Adidas
VF Corp
Rothy's
Cascale
Everlane
eBay
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