Smartwool Classic All-Season Merino Base Layer Long Sleeve Crew Men's

Whether you're skinning up a spring couloir or zipping into a sleeping bag on a cool summer night, this base layer earns its spot in the pack. Smartwool built it with Core Spun technology, wrapping soft, responsibly sourced Merino wool around a durable nylon core so it holds up trip after trip without losing that next-to-skin comfort. Flatlock seams and an offset shoulder and side seam construction mean no chafing under a pack strap or harness, and the slim fit layers cleanly under a shell or on its own around camp. Merino wool naturally manages moisture and resists odor, so you can wear it hard for days before anyone notices. Built for skiing, camping, paddling, or just about anything else the calendar throws at you, this crew earns the name Classic All-Season.

Features

• Core Spun technology wraps durable recycled nylon in soft Merino wool for a base layer that lasts
• Flatlock seam construction helps minimize chafing during high-output days
• Offset shoulder and side seams sit smoothly under pack straps and harnesses
• Side seams wrap to the front for added comfort and coverage
• Responsibly sourced Merino wool naturally manages sweat and resists odor buildup
• Versatile year-round design suited to skiing, camping, paddling, and everyday layering