The Columbia Women's Glacial IV Half Zip Fleece is a cozy and stylish base layer top that is perfect for jogging and outdoor activities. It is made with Columbia's Glacial IV fabric, which is soft, lightweight, and breathable. The half-zip design allows for easy ventilation and temperature control. The mock neck provides extra coverage and warmth. The fleece material traps heat and keeps you cozy in chilly weather conditions. Whether you're running on a crisp fall morning or layering up for winter, this base layer top will keep you comfortable and fashionable.