Navy wool. This is a traditional piece with a cable knit design. It's not a tight-fitting sweater that clings to the body, but it's also not the trendy oversized style. It's a standard wool sweater, neither thin nor thick. The brand tag, which was originally at the neckline and touched the skin, has been removed. However, as indicated on the tag in the second photo, it's from United Arrows. It's a classic design, so you can wear it regardless of current trends.