The women's Polarmax Active Stretch Base Layer Tight is a baselayer bottom for layering under ski pants, adding warmth and flexible support on cold days on the slopes. Four-way stretch moves with the body, while polyester-spandex fabric wicks moisture to help keep movement comfortable. Acclimate Dry technology helps regulate temperature and moisture, and activated carbon supports odor control and moisture absorption. Bio Silver treatment helps reduce odor-causing bacteria.