Tilly and the Buttons: Introducing the Indigo smock top or dress pattern! Tilly and the Buttons: Inspiration and Fabrics For Making Your Indigo Smock Tilly and the Buttons: Inspiration and Fabrics For Making Your Indigo Smock Iris Lifestyle. ?? This smocked cotton top is designed to bring bold texture and effortless femininity to everyday dressing. Crafted from breathable cotton in a striking blue checkerboard pattern, the fully smocked bodice creates a flattering, flexible fit. Puff shoulders, fluted cuffs and a soft peplum hem add gentle movement. Style this cotton top with denim or tailoring for easy day to evening styling.