The Under Armour Women's ColdGear Armour Compression Mock is a top choice for women looking for a high-quality 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 during workouts. With a stylish design and a variety of color options, this top is not only functional but also fashionable. It is no wonder that it is one of the most wished-for women's synthetic base layer tops on Amazon.