BounceUp mens heated vest combines 21 carbon fiber heating zones with 4 independent heat controls for more personalized cold-weather warmth. Separate controls adjust the neck, shoulders, front and back independently, allowing you to choose different heat levels across four key upper-body areas. Three heat levels — 25°C (77°F), 35°C (95°F) and 45°C (113°F) — make it easy to adapt warmth as conditions change. A wind-resistant shell, stand collar and full-length zipper help reduce exposure to cold wind, while stretch elastic armholes support comfortable movement and easy layering. Compatible with USB power banks providing 5V/2A or higher output, power bank not included. Available in US sizes S-XL.