The Columbia Women's Glacial IV Half Zip Fleece is a highly rated base layer top on Amazon. It features a gradient design that adds a touch of style to your outdoor adventures. This top is made with Columbia's Glacial IV fleece fabric, which provides warmth and comfort in chilly conditions. It has a half-zip design, allowing for easy ventilation and temperature control. The lightweight and breathable material make it suitable for layering or wearing on its own. With its positive reviews and high ratings, this base layer top is a reliable choice for women seeking warmth and functionality.