Smartwool Classic All-Season Merino Base Layer 1/4 Zip for Men (SALE) Size:M Astro makes a great go-to

Astro makes a great go-to pad for adventures anywhere

Brushed 50D polyester knit is very soft and comfortable

With the same deep-dish Hyperspoon concave nose

Trekking Pole Carry: Easily remove or replace poles while running

Smartwool Classic All-Season Merino Base Layer 1/4 Zip for Men (SALE) Size:M Astro makes a great go-toSmartwool's popular Classic All Season Merino Base Layer 1 4 Zip is the perfect base layer for warm or cold weather. This top uses 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.