The Thermotech Women's Performance Base Layer Bottoms offer the midweight warmth, comfort and moisture management that you need. These tights are made from a two-layer performance polyester fabric connected back-to-back with an open space between the layers to trap and hold warm air. They are knit with ACCLIMATE® Dry polyester fibers that transport moisture away from the skin keeping you dry, warm and comfortable while their odor blocking technology enhances freshness and odor control. Stay active and cozy this winter with the Thermotech Women's Performance Base Layer Bottoms!