Elastic closure Machine Wash FEATURES: Moisture wicking, Anti Static, Anti Odor, 4 Way Stretch, Tag Free Label, Elastic Waistband FABRIC: 40% Polyester, 34% Acrylic, 22% Rayon, 4% Spandex. Lightweight knit with a lot of stretch. The acrylic blend adds additional lightweight warmth that is comfortable against the body. COLD WEATHER: Lightweight warmth, can be worn invisibly as first layer underneath any other clothing. WASH CARE: Wash Cold Gentle Cycle with Like Colors, Tumble Dry Low, Non-Chlorine Bleach Only, Do Not Dry Clean, Iron Cool (if needed)