For cold days when you don't want to miss a run, the Nike Therma-Sphere Element Women's Long-Sleeve Running Half-Zip Top is made to keep you warm and comfortable. The loose fit drapes on your body with generous room to let you move freely. It's roomy enough to layer the top over a tank or tee. Designed for Comfort Thumbholes keep the sleeves from flapping as you move and built-in mittens fold over to help you avoid bringing your own pair. Stay Warm, Stay Dry Soft, fleece-like Nike Therma-Sphere fabric helps you stay warm by holding in your body's natural heat. The fabric has Dri-FIT Technology that wicks sweat away from your skin to keep you dry and comfortable. Versatility The half zip at the front can be opened for ventilation when you need it. As you transition to post-run plans, the zipped-up collar offers a polished look.