Smart Warming Vest

Thermal vest for sports. Important Information Material: Cloth Package Size: 300 x 240 x 30 mm Product information:  Collar type: stand-up collarPlacket: zipperFabric name: chemical fiber blendedMain fabric composition: polyester fiber (polyester)The content of the main fabric ingredient: 100 (%)Charging method: USB Feature:* 1. Numerous heating zones and 3 temperature settings: carbon fiber generating heating elements to heat the waist, abdomen and upper back; 3 heating settings with one button.* 2. USB charging: convenient to charge. Still need to connect 5V2A mobile power (this product does not include mobile power). The power must be disconnected when moving and washing.* 3. Safety and health: only 5V far-infrared heater, much lower than the human body safety voltage of 36V. Stable warmth and safe tension of the body. Suitable for better heating of the abdomen and waist area.* 4. Large area heating: The electric heating vest has multiple built-in heaters, which have the f