Safe and Smart: The rttizan heating vest is made of carbon fiber with high quality imported TPU heating plate for fast heating. When the heat increases, stop working until the heat returns to normal operating temperature. Helps promote blood circulation and relieve muscle pain in winter. Ideal for those who always suffer from bone pain in cold or rainy days The heating jacket has 3 temperature settings: fast heating in 1 - 3 seconds, 5 heating pads to heat up to 60 - 65 C on different parts of the body (left size, right waist, left waist, right waist and middle back). 3 temperature levels selectable via LED button: Red (60 - 65C), White (50 - 55C), Blue (40 - 45C) Neutral Sizes and Styles: Sizes can be adjusted to your needs. This A simple electric heated jacket for men and women. It is perfect for all types of winter sports or outdoor activities such as hunting, hiking, skiing, cycling, fishing, work and more. USB Compatible Power Supply: The USB plug is compatible with most power bank 5V/2.1a output, providing fast electric heating, no radiation, and harmless to human body. 10000mA full charge, heated vest for 12-6 hours (power bank not included) Light to skin: This heated vest is made of lightweight carbon fiber. Wind and water resistant, support hand wash, machine wash and dry clean. It feels comfortable and smooth, keeping you warm all winter long without the need for a heavy coat. A great gift for the elderly, family or friends