SportHill Men's NorthWind Unders Briefs 85% Polypropylene/ 15% Spandex Imported SportHill Men's NorthWind Unders Briefs keep you warm and protected in frigid temperatures Ideal under-layer for cold-weather sports and camping, including skiing, winter climbing and hiking, and running Made with DryLine Lite fabric to wick moisture away from the skin With a SportHill 3SP front panel to block wind and provide extra warmth Unders feature a brushed elastic waistband and flatlocked seams for zero abrasion