This soft thermal base layer is perfect for light hikes, travel, and everyday wear. Thumb holes and a zip increase warmth when you need it. The merino wool content means you can still wear it more between washes. A touch of elastane adds comfort and stretch. Merino wool is one of nature's finest fibres. It offers natural temperature regulation and odour resistance. A slim-fitting thermal made for lightweight warmth. Great on its own, and under layers.