Features: -With two 3.7V/4000mAh rechargeable batteries, it can keep you warm and comfortable all day long. -Made of high quality cotton and spandex, it is elastic, breathable, soft and comfortable. -It can be hand washed and machine washed (gentle mode), and can be used again after washing and drying (remove the batteries before washing). -There are three temperature settings, high (red), medium (orange), and low (green). -Perfect for all kinds of outdoor sports, especially suitable for rock climbing, hiking, motorcycling, skiing, skating and so on. Specification: .
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