Hand Warmer, Body Wamer, Knee Warmer manufacturer / supplier in China, offering Disposable 8-10hours Self Heating Foot Warmer Patch in Insole Shaped Thermal Warmer Patch Pack, 8-10 Hours Self-Heating Portable Foot-Warming Insole Heating Pack for Cold Weather Activity, Self-Heating Soft-Cushioned Insole Foot Warmer Feet Warming Pad for All Winter Long and so on.