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 100 Level Top is the lighter of our two Altitude weights, designed for chilly but not Arctic conditions; a practical solution to snowy 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.