This Men's Heated Pullover features 3 heating zones and can last up to 10 hours on a USB standard input with updated carbon fiber heating elements and concentrated heating zone. Made of 70% Cotton and 30% Polyester, this pullover is designed for temperatures between 10° F and 54° F and provides long-lasting warmth and breathability. Perfect for outdoor activities like walks, hikes, and team sports, this heated pullover is easy to care for and can be safely washed by hand or machine. It has been tested for over 80 cycles and will provide comfortable warmth for years to come.