From the website: A soft and stretchy long sleeve T-shirt for everyday comfort and layering, the Siren Long Sleeve Sweetheart features a slim fit and our corespun merino wool blend fabric. A great base layer in size small. Quite fitted, I think this would also fit an XS very well. Only worn a few times (I gained weight and am now more of a medium, or else I wouldn't be selling!). Great neckline for an attractive but functional fit. Excellent used condition. The color is a goldenrod/mustard.