Layer up in cozy comfort on chilly weather days in the Columbia Outdoor Tracks 1/2 Zip. Omni-Heat reflective lining: Metallic lining reflects body-generated heat for improved warmth retention. Backing dissipates excess heat. Membrane comprises 65% of lining for high breathability. Synthetic-down polyfill imitates down for low weight and increased warmth retention. Stand collar with front half zip-closure. Zippered chest pocket with woven overlay. Long sleeve design. Woven overlay. Cinching at waist. 100% polyester. Machine wash, tumble dry.