Classic thermal base layer: A slim-fitting men's long sleeve top, ideal for layering in winter and cold weather, designed for comfort and a great fit following the contours of the body 100% natural merino wool: Made from lightweight ZQ-certified merino wool yarn with an interlock knit for comfort, breathability, thermoregulation and natural odour resistance Sport, winter, hiking and ski clothes: Our thermal base layers are ideal for wearing underneath ski jackets, or worn on their own as a men's running top or casual men's jumper Stylish finish: The men's crew neck sweater features a flatlock seam construction and offset shoulder and side seams, designed to help increase comfort and minimise chafing Go Far. Feel Good. Complete your winter wardrobe and create a cosy thermal layering system with Smartwool's merino wool technology, for ultimate all-season comfort all day long