Founded in 2018 by Isobel Elphinstone is a luxury women’s swimwear brand which sees the beauty in simplicity. We offer the perfect collection of timeless one-piece swimsuits with a focus on fabric and a flattering fit, giving every COSSIE customer confidence and style.

The beautiful signature matte honeycomb fabrication is double lined across all styles, giving an element of natural support and a super luxurious feel. All styles transcend seasons and trends, creating a collection that is made to last.

Social + ethical responsibility is paramount at COSSIE+CO. Our swimsuits are designed in London, made with love in London and worn with style all over the world…no sweat shops here!