... ,waterProduct Material:1. Made up of 3 parts: heating material; adhesive layer ; the non-woven fabrics bag Heating material is inside ... feature is high air permeability, and can prevent leakageHigh quality adhesive layer can apply to the clothes firmly when you use ... Heating simple, No need outside energy, plug, hot waterUltra thin ultra light, easy to carry, suitable for outdoor sports Instruction:Take ...