The Men's Classic All-Season Merino Base Layer Long Sleeve Top is made from a mixture of merino and nylon, which will help keep you warm and comfortable as you ski, run, hike and explore the great outdoors. Complete with offset shoulders and side seams to increase comfort and minimise chafing. Merino wool fabric made with an interlock knit - for enhanced comfort, breathability, thermoregulation, and odour resistance. Slim fit - follows contours of body. Merino jersey fabric uses nylon core - to increase durability whilst still keeping 100% merino wool next to skin. Offset shoulder and side seams - to increase comfort and minimise chafing. Side seams wrap to front for body-enhancing fit. Flatlock seam construction - designed to minimise chaffing. Fit: Slim. Fabric: 87% Merino Wool / 13% Nylon. 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.