USB Rechargeable Lithium Battery Heating Insoles

Battery: 3.7V/2000MAH

Warm time: constant temperature for 4 hours

Size: 36-44 yards (can be cut)

Accessories: Electric heating insoles, charging accessories, two batteries, bracers, instruction, gift box.

Material: Use heating film inside, fluff surface, environmentally friendly layer and cotton multi-layer composite.