The women's Brooks Momentum Thermal Quarter-Zip combines warmth and comfort, making it ideal for frosty morning runs or chilly evening strolls. The thermal material keeps you cozy, while the thumbholes and fold-over hand mitts provide additional warmth, conveniently folding away when you start to heat up. An antimicrobial finish prevents the growth of odor-causing bacteria, and the reflective back trim increases visibility in low-light conditions.