The long-sleeve Harkila Base Warm undershirt is the warmest in Harkila's collection. It is made from a very soft, warm, breathable, and naturally temperature-regulating wool blend, making it an ideal midlayer in cold weather. The undershirt has a high collar that you can close snugly around the neck, or zip open to the chest when you need to cool down.
To see more from Harkila, visit the Harkila Collection