Flat seam construction to reduce bulk and skin abrasion; Crew neckline with self-binding at trim; Slight drop tail for easy layering; Intimate blend of enhanced polyester and spandex fibers; Moisture Transfer Fibers to move moisture away from the skin; 4-way stretch for unlimited movement; Bio-Silver anti-microbial treatment prevents odor-causing bacteria; UPF 30+ protection; Warmth Factor 8: Great for cold conditions and perfect for performing with you all day on the mountain; Women's Sizes: XS-XL