Cold weather doesn't have to be miserable weather. The Altitude Baselayer collection is designed to help you not just endure, but enjoy the cold. This 200 Level Top is the heavier of our two Altitude weights, designed for harsher Winter conditions; a heavy-duty solution to heavy-duty problems with added length in the body allowing for this baselayer to be tucked into any overpant. Fitting snugly to the body, the Men's Crewneck is made of machine-washable, mulesing-free wool, offering you a more sustainable and ethical choice in baselayer without sacrificing comfort as you join us in contributing to positive global change in production standards.