The Under Armour Women's ColdGear Authentic Mock is a popular choice for women's jogging base layer tops on Amazon. It is made with a dual-layer fabric that provides a warm and comfortable fit. The top features a mock neck design and a fitted silhouette, making it perfect for layering under other clothing or wearing on its own. The ColdGear technology helps to keep you warm and dry by trapping heat and wicking away sweat. It also has a four-way stretch construction that allows for a full range of motion during your workouts. With its stylish design and high-performance features, it's no wonder this top is a top choice among women joggers.