Stay warm and comfortable in the Brooks Momentum Thermal 1/4 Zip! This versatile layer combines thermal warmth with breathability for the perfect ratio. Its thumbholes cover your hands and keep sleeves in place, while fold-over hand mitts fold away easily when the run heats up. Designed for cool-weather runs, the Brooks Momentum Thermal 1/4 Zip takes the chill out of fall and winter miles! Lightweight warmth: Thermal material provides a soft and cozy feel and maintains breathability for an ideal warmth-to-weight ratio. Warm details: Thumbholes cover hands and keep sleeves in place, while fold-over hand mitts offer convenient warmth and easily fold away when the run heats up. Odor resistant: Antimicrobial treatment eliminates bad smells by preventing odor-causing bacteria from growing. Semi-fitted Sleeves feature thumbholes and fold-over hand mitts Reflective back hem