With a shared love of ‘70s style codes; friends and co-founders Nikki Campbell and Sophie Coote launched SIR (or Separates; Intimates; and Ready-to-Wear) to craft the pieces they want to see in their own wardrobes. From matching sets to dream cover-ups and floaty separates; this season sees the return of favorite silhouettes in the same Bondi Beach inflection that made the label a hit. The 'Lilou' bikini brief has a cheeky silhouette with a single self tie that can be styled low or high on the hip. Complete the set with the [matching triangle top](https://www.modaoperandi.com/women/p/sir/lilou-string-triangle-top/715365).