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 chafing. Fit: Slim. Fabric: 87% Merino Wool / 13% Nylon.