The Marmot Women's Midweight Base Layer Top is a top-rated option for women's outdoor base layer tops. It is made with a blend of polyester and elastane, providing a comfortable and stretchy fit. The fabric is designed to wick away moisture and keep you dry during intense activities. The top also features flatlock seams for added comfort and a crew neck design for added warmth. With its versatile performance and durable construction, this base layer top is perfect for a wide range of outdoor activities.