I have this top in a lovely sage green colour. How would you style it casually? What layer would work? [[https://www.cos.com/en_gbp/women/womenswear/tops/product.boxy-polo-shirt-blue.1271773001.html https://www.cos.com/en_gbp/women/womenswear/tops/product.boxy-polo-shirt-blue.1271773001.html]]