100% PolyesterUltra-Light Weight and Wind Resistant: Ultra-light down vest just 0.78lb; Suitable for outdoor activitiesFind the Perfect Temp: High, medium, and low heat settings allow you to change the level of warmth with the push of a buttonWarm All Over: 4 carbon fiber heating elements generate and trap heat across core body areasEasy Care: No special washing instructions since the durable fabric and carbon fiber heating elements are machine washable