New Balance Women's Lightweight Solid Half Zip Jacket The NB Stretch 1/2 Zip is about freedom of movement in all conditions. With a stretch, brushed-back microfleece fabric and athletic cut, this top provides excellent range of motion on and off the field. • 88% polyester, 12% spandex • Athletic fit • Brushed-back stretch performance fleece • Pouch pocket • Heat transfer NB logo