Description Lining: 100% Polyester.Power bank not included. Polyester lining. Zipper closure. STYLISH DESIGN WITH BREATHABLE FABRIC: Soft shell fabric exterior with breathable lining ensures you dont lose any excess heat and enjoy comfortable warmth; Detachable hood is specially designed for chilly mornings and extra protection on windy days; Slim-fit design relieves you of worrying about bulkiness. HEAT ACROSS BODY: 3 carbon fiber heating elements generate heat across core body areas (left right chest, mid-back); Adjust 3 heating settings (High, medium, low) with just a simple press of the button. FOR ALL WALKS OF LIFE AND ADVENTURES: Ideal and warm choice for you, family members, friends, employees, to enjoy outdoor activities. NO WORRIES AT ALL: Machine washable. The carbon fiber heating elements and jacket construction are designed to endure 50+ machine wash cycles.