Lightweight Winter Warm Waistcoat Electric Heating Vest USB Charging Heated Coat Thermal Vest with Pocket for Walking Camping Ice Fishing Snowboarding Skiing Mid-back and collar back  heated by carbon fiber filament,superior polyester with warm cotton lining retain heat of your body.Perfect vest for outdoor camping,hiking and ice fishing in winter.It is lightweight for unrestricted movement and no need to wear a lot and looks corpulent. Features: Carbon fiber filament on mid-back and collar back,3 adjustable heating temperature(77°F / 95°F / 113°F). Silver insulating material inside,reduces your body heat loss to keep you warm. Heating in minutes with 5v power bank(not included),and stopping heating as long as power off. Comfortable and water repellent polyester with warm cotton lining keep wind out and retain body heat. Tailored and lightweight design with elastic shoulder open,fitting on your body for unrestricted movement. Easy to wash but do not wring it out.Please take out your power bank before washing. 2 side zipper pockets and 1 inner zipper pocket for easy storage. Perfect for daily commute,walking dog,wearing over your winter jacket for camping,hiking,snowboarding,skiingand ice fishing. Specification: Color: Black / Blue (optional) CN Size: L / XL / 2XL / 3XL / 4XL (optional) Material: Polyester + Cotton Heated area: Mid-back & Neck Back Controllable temperature: 25°C / 35°C / 45°C Working temperature: -5~40°C / 23~104°F Package weight: Approx. 355-412g/12.5-14.5oz Package List: 1* Waistcoat NOTE: 1.Please take out your power bank before washing. 2.Add some neutral detergent to wash.Do not use high temerature water. 3.Do not wring it out.Use only after washing has been naturally ventilated and dried. 4.Do not use the coat in wet condition,please turn the power off and take the coat off. 5.Use time depends on the battery capacity of your power bank. 6.The coat stops heating as long as the power off. 7.If not use for a long time,please do not plug in your power bank.