Citizens of Humanity Kayla Shirt Optic White Size XS. The Kayla Shirt is a timeless button-up, cut from ultra-lightweight cotton poplin with an airy, breathable hand. Designed with a relaxed silhouette and long sleeves, it drapes effortlessly for a laid-back yet polished feel. Wear it tucked, layered, or left loose for versatile everyday styling. This fit is true to size. Looks Like: Clean bright white long sleeve button front shirt Feels Like: Ultra lightweight breathable cotton with an airy hand