Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Color:Twilight Blue lightweight fabric offers next-to-skin comfort

lightweight fabric offers next-to-skin comfort

to assess their durability and long-term performance

Homogeneous and comfortable proximity lighting:

and dual-side zips make it easy to climb in and stay toasty when the wind picks up

Create up to 16 user profiles for family

Smartwool Classic All-Season Merino Base Layer 1/4' zip Men's Color:Twilight Blue lightweight fabric offers next-to-skin comfortOur 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.