Columbia Sportswear Big Men's Omni-Heat Midweight Baselayer Tights New with tags. Black color Polyester-stretch blend material, Base layer weight: midweight Omni-wick tech pulls moisture away from skin Omni-heat thermal reflective lining for additional warmth Smooth, stretchy, lightweight, 4-way stretch, with anti-microbial treatment Flat elastic waistband, flatlock seams 2X (43 - 45 in Waist, 47.5 - 49 in Hips)