Description: Feature - Warm, Comfortable, Classic Style Design: It can ensure that you do not lose any excess heat, enjoy the comfort of warmth. It is gentle, waterproof, windproof, ensuring you are not restricted to outdoor sports without losing elegance. - Safe and Reliable: 5V safe voltage, the heating piece uses carbon fiber heating wire, no radiation, stable heat, temperature control. - USB Charging, Safe Washing: It is convenient to charge. You need to always connect 5V mobile power, (the product does not include mobile power). You need to remove the mobile power when washing, you can easily wash, hand wash, dry cleaning. - Three-Speed Temperature Adjustment:Three high temperature, medium temperature, low temperature mode adjustment, easy heating. - Widely Applicable: Ideal gifts for family members, friends and staff, enjoy snowmobiling, motorbike, hiking, camping, hiking, skiing, fishing, hunting or office daily life and autumn and winter. Specifications: Heating area: Back neckline, back Crew neck Product name: Electric Vest Material: 100% nylon/Filler: 100% polyester Features: intelligent three-speed temperature control adjustable Size: S/M/L/XL/XXL/XXXL/XXXXL Package Included: Heated vest*1 Notes: Precautions: Do not use the wet clothes for electricity. If the rain is wet, please turn off the power and stop using. This product does not include mobile power, and you must always connect to the mobile power source when using it. The size of heating vest is measured by hand, and there will be an error of about 3cm. It is recommended to buy a larger size