This superfine merino jersey is 100% wool, with no spandex content. This makes it behave a little differently than our other jerseys. It relaxes significantly while wearing, and we compensate for this when we size your garment. This means that your garments will feel quite snug when you first put them on. Don't panic! It will loosen up nicely as you wear it. This lightweight, quick-dry fabric is perfect for travel.