The Under Armour Women's ColdGear Armour Compression Mock is a popular choice for women looking for a synthetic base layer top. Made with a blend of polyester and elastane, this top offers a snug and comfortable fit. It features Under Armour's ColdGear technology, which helps to keep you warm and dry in cold weather conditions. The compression fit provides support and helps to reduce muscle fatigue. This top is also equipped with moisture-wicking properties to keep you dry during intense workouts. With its stylish design and excellent performance, it's no wonder this top is a top choice among women on Amazon.