Add a cozy layer to your jogging outfit with the Columbia Women's Glacial IV Half Zip Fleece. This base layer top is made with soft and lightweight fleece fabric that provides warmth without adding bulk. The half-zip design allows for easy ventilation and temperature control. The mock neck collar provides extra coverage and protection against the wind. The regular fit offers a comfortable and relaxed feel. Whether you're jogging in the park or exploring the trails, this base layer top will keep you warm and comfortable on Amazon Prime Day.