Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Color:Twilight Blue All Satellite Systems and Music:

All Satellite Systems and Music: Up to 20 hours

seam-sealed

to assess their durability and long-term performance

polyhydroxystearic acid

Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Color:Twilight Blue All Satellite Systems and Music:Our 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.