About the brand

Founded in 2014 by designer Agata Natalia Kozak, COSSAC is a London-based womenswear label committed to sustainability and conscious design. Focused on eco-friendly fabrics like organic cotton, Tencel, and recycled materials, the brand produces timeless capsule collections in small batches. Made in ethically run European factories, COSSAC blends modern, minimalist style with a strong commitment to transparency, ethical labor, and low-impact production.