New Balance Heat Grid Half Zip Women's Top Don't let the cold weather stop you from getting outside for your run with the Heat Grid Half Zip Women's Top. This running top is packed with features to keep you warm, including NB HEAT technology and heat grid material. Designed to keep you warm for running in all weather, the New Balance Heat Grid Half Zip Top features NB Heat technology and is constructed from a soft Polyester heat grid knit for all-round comfort and warmth. The NB Heat technology helps to retain heat within the top keeping you feeling warm in cooler conditions making this top a necessity for cold-weather running. Moisture-managing, the NB Heat technology also wicks away sweat and excess moisture from the skin allowing it to evaporate quicker for a dry and comfortable wearing experience; with few distractions and a more focused run. Increasing the warming feel, the top is constructed from a soft Polyknit heat grid material that provides outstanding ne