Champion Duofold by THERMatrix153; Women&acirc;&euro;s Crew 92% Polyester/8% Spandex Importado 92% Polyester/8% spandex Reinforced with logo neck tape. C Vapor technology is designed to adapt as your body heat rises and helps you dry faster. Lightweight, non-bulky warmth with plenty of stretch for ease. Contrast stitching is ultra soft and resists chafing.