The Columbia Women's Glacial IV Half Zip Fleece is a popular choice for women's outdoor base layer tops. Made from soft and cozy fleece fabric, it provides warmth and comfort in cold weather. The half zip design allows for easy ventilation and temperature control. It features a flattering fit and is available in a range of colors. Whether you're hiking, skiing, or simply enjoying the outdoors, this base layer top is a versatile and stylish option.