A two-layer fabric with an ultra-warm, brushed inside and a smooth, quick-drying outside. The 4-Way Stretch technology allows for better movement in every direction. The material wicks away sweat and dries very quickly. Ribbed side panel for added flexibility and comfort. Practical front 1/2 zipper for easier dressing/undressing. Built-in thumbholes help keep the sleeves in place and trap heat. Raglan sleeves.