Take on the great outdoors with the Mens Thermolator Performance Crew Top. Crafted from merino wool, this lightweight, moisture-wicking, and temperature-regulating baselayer top are versatile for all-season use and excel in cold weather activities.When your aerobic activity increases and your skin temperature rises, the fabric allows moisture vapor to escape to maintain comfort.The Mens Thermolator 2.0 Crew Neck Top goes perfectly with the Mens Thermolator 2.0 Pant and other pieces from the Thermolator collection.WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov