Zipper closure Machine Wash HEAT ACROSS WHOLE BODY: Three carbon fiber heating elements generate heat across core body areas (left & right chest, mid-back). Switch between three heat settings (High, medium, low) with a simple press of a button. QUICK AND LONG-LASTING WARMTH: Heats up in seconds and stays powered for up to 10 hours on a full charge. EASY CARE: Machine washable; The carbon fiber heating elements and vest construction are designed to endure 50+ machine wash cycles. Men's USB Charging Heated Hooded Vest with 3 Heating Levels, 11 Heating Zones