So comfy you can live in it! The Sirena Rib Tank is made from a cotton spandex rib knit fabric that was given a special wash for extra softness. With its sleek silhouette, this tank makes the perfect summer layer, no matter the weather. 95% cotton 5% spandex Machine wash cold, tumble dry low Summer Layers, Blue Fern, Rib Knit Fabric, Orange Cream, U Neck, Busy Mom, Perfect Summer, Cotton Spandex, Basic Tank Top