Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Size:L Get up to 20 days

Get up to 20 days of battery life in smartwatch mode with solar charging1

Taped seams

-500D CORDURA® fabric

Breakthrough design combines the strength of carbon fiber with ultralight foam to create one of our most innovative

Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Size:L Get up to 20 daysOur popular Classic All Season Merino Base Layer 1 4 Zip is the perfect base layer for warm or cold weather. This top uses our All Season weight Merino fabric wrapped around a nylon core to increase durability, while still keeping the 100% soft, Merino wool you love next to skin. Side seams help minimize chafing while wearing a pack and offer a body enhancing fit. This base layer is comfortable, powerful, sustainable, and, frankly, do it all able.