With Megaheat technology, your daily run doesn't have to suffer from weather delays. The New Balance Megaheat Half-Zip pullover top uses your perspiration to activate cutting-edge, moisture-wicking fabric that helps raise your body temperature and protect you from the cold in comfort.
MegaHeat® delivers exceptional warmth with maximum flexibility, creating the ultimate in lightweight breathable performance apparel. The versatility of MegaHeat makes layering easy and comfortable. Worn as a base layer, the supple fabric feels soft and dry against the skin.