For those who want both style and performance, the Under Armour Women's ColdGear Authentic Mock Neck is the perfect choice. This base layer top is made from a blend of polyester and elastane, providing a comfortable and stretchy fit. The ColdGear fabric traps heat and wicks away sweat, keeping you warm and dry in cold weather. The mock neck design adds a touch of elegance, making it suitable for both outdoor activities and casual wear. With its excellent quality and stylish design, it's no wonder this top is a best seller on Amazon.