Copy of Who We Are - safe keeping


“We want to create timeless, yet trendy garments; beautiful, yet ethical.” 

 Who We Are

Each garment embodies the lifestyle, vision and values of COSSAC founder Agata Natalia Kozak

Agata was born and raised in Poland before studying fashion in Barcelona at ESDi and then in Istanbul at the prestigious Mimar Sinan Fine Arts University. 

After relocating to London, one of the world’s fashion epicentres, Agata worked for both high-end and high-street labels and witnessed the furiously fast and destructive side of the industry she loves. In 2014, realisation led to innovation and Agata created COSSAC, a progressive label looking to take sustainable clothing to new #ECOHOT dimensions.

Our Capsule Wardrobe collections offer versatile, consciously designed transeasonal garments that celebrate the female body with timeless ease. Exploring strength in simplicity, each range brings a thoughtful edit of feminine pieces to help women find beauty in their wardrobes season after season, complementing their mindful lifestyle and creative freedom. 

COSSAC exists to offer women design-led honest fashion. We help drive awareness of the negative social and environmental impacts of our industry and make it easy for women to make better choices. 

While we take the concepts of sustainability seriously, we deal with all the heavy stuff so you won’t have to. COSSAC is committed to slow fashion with a focus on transparency, sustainability and social well-being. Our mission is to deliver balanced and concise collections made consciously with respect for every contribution along the way. 

The future of fashion is just, sustainable and #ECOHOT. To help customers be part of the fashion revolution you can find out about our factory partners here & our materials here. We’ve also created a dictionary with useful terms which you can find here

We make it our purpose to keep COSSAC pieces in circulation and extend the enjoyment of our garments by opening access to our archive for exclusive sales and participating in rental initiatives to further reduce waste. 

Join our journey today to receive collection previews and exclusive invites to shop our archive.