A soft and stretchy women’s T-shirt with a flattering slim fit, the Siren Short Sleeve Sweetheart is made with our corespun fabric. Corespun uses nylon fibers wrapped in merino wool for added strength and durability that retains next-to-skin softness. Ideal for year-round use whether traveling, hiking, or relaxing after a big day outside, the Siren also features a feminine sweetheart neckline—perfect for everyday comfort and layering.