This heated vest features ten carbon fiber heating elements strategically positioned across the chest, back, waist, and abdomen to provide comprehensive warmth during cold weather. The vest connects via USB cable to any compatible power bank (5V/2A, not included) for convenient portable heating wherever you go. Three adjustable temperature settings allow you to customize your comfort level: high heat reaches approximately 136°F, medium heat reaches 118°F, and low heat reaches 100°F. Simply press the power button to cycle through the color-coded temperature indicators and select your preferred warmth level. Constructed with soft pure-cotton stuffing and durable polyester outer material, this vest delivers a comfortable fit without excessive bulk. The lightweight design makes it ideal for layering under jackets or wearing on its own during outdoor activities, commuting, or any cold-weather situation. The heating elements are designed to enhance blood circulation while keeping your core body temperature regulated throughout the day. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. To use, connect the included USB cable to your power bank, insert it into the vest's power port, and press the button to activate heating. Hand wash or spot clean only to maintain the heating elements. Do not machine wash or dry clean.