- Size: S • Heated vest HW-01 with carbon nanotube heater for maximum comfort. • Thin and lightweight design with excellent thermal conductivity. • 4 adjustable heating levels from 38 to 53 ºC. • Provides up to 12 hours of continuous heat with a 10,000 mAh battery. • Includes a USB charging port in the inner pocket for connection to an external battery. • Compatible with most external batteries on the market. • Made with high-quality fabric for greater comfort and durability. • Hand washable, ensuring to remove the battery before washing. • Safety feature that automatically stops the heat after 3 hours. • Perfect for sports and outdoor activities like golf, hiking, skiing, sailing, cycling, fishing, hunting, and camping.