- Size: M • Heated vest HW-01 with carbon nanotube heater. • Thin, lightweight, and with excellent thermal conductivity. • 4 heating levels from 38 to 53 ºC. • Up to 12 hours of heat with a 10,000 mAh battery. • USB charging port in the inner pocket. • Compatible with most external batteries. • High-quality fabric, comfort, and durability. • Hand washable, remove battery before washing. • Heat stops automatically after 3 hours. • Ideal for sports and outdoor activities like golf, hiking, skiing, sailing, cycling, fishing, hunting, camping. • Perfect for outdoor workers, delivery personnel, and people who commute daily.