It's warm without layering because it's fleece-lined! The outside is probably polyester, but it has a neat silhouette. It stretches a lot, so it's comfortable to wear, looks sleek, and keeps you warm. It's simple, so it suits any age. It's not that thick, so it doesn't feel bulky when tucked into bottoms. The neckline looks high, but it's not constricting. Details are unknown as there is no manufacturer or tag information. Size: F Length: Approximately 56cm Width: Approximately 38cm (when laid flat)