WARM TO THE BONEForget the cold with this super-warm compression baselayer. Omni-Heat thermal-reflective lining retains your body heat with ease.DRY AND FRESHUltra-wicking fabric moves sweat away from your skin in a flash, and an antimicrobial treatment protects this product from bacterial growth.COMFORT AND STRETCHMove comfortably with 4-way comfort stretch and a flat seam construction. 4-way comfort stretch This product incorporates an antimicrobial treatment intended to protect the product from bacterial growth. The active biocidal substance is: pyrithione zinc. Ergonomic seaming Flatlocked construction Omni-Heat™ thermal reflective Omni-Wick™ Composition85% polyester / 15% elastane Omni-Heat™ Reflective Anytime Stretch Jersey85% polyester / 15% elastane stretch jersey Omni-Wick™ Anytime 1639031 Columbia Women's Omni-Heat MidWeight Stretch Baselayer Tights (Black 011)