The Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Shirt is designed to deliver comfort and performance in every season. Built with Core Spun technology, it features soft 100% Merino wool wrapped around a recycled nylon core for enhanced durability without sacrificing next-to-skin comfort. Its lightweight construction makes it versatile enough for spring skiing, summer camping, or layering in colder conditions. Flatlock seams and offset shoulder design reduce chafing and pressure points, making it ideal for wearing under packs or gear. No matter the activity, this base layer provides reliable moisture management, odor resistance, and temperature regulation all year long. | Smartwool Men's Classic All Season Merino Base Layer Long Sleeve Shirt