Smartwool's Classic All-Season Merino Long Sleeve Base Layer top is built for everything from spring snowshoe outings to summer camping to winter ski laps, serving up Merino wool comfort and a movement-friendly cut. Offset and flatlock shoulder and side seams increase comfort by minimizing chafing, while Smartwool's plant-based dye provides not only a sustainable top but also a one-of-a-kind look.

Specs

• Slim-fit base layer built to mirror your movements with cozy Merino wool comfort
• Merino jersey fabric uses a nylon core to increase durability
• Colored using an environmentally-conscious plant-based dye process
• Offset shoulder and side seams designed to increase comfort and minimize chafing
• Side seams wrap to front for body-enhancing fit
• Flatlock seam construction designed to minimize chafing and hot spots
• Made of 88% Merino wool / 12% nylon