... mixedMaterial: PVC,silk, pinwaleHigh quality, reasonable price, warm serviceSafety design, can auto cut off when reaches certain degreesIt won't burnst ... % before shpt Just need to charge 7-10 minites, and can last heat at leat 4-8hours, keeps you always warm ... cold weather, light weight, easy to take, safe to charge, can meet all kinds of voltage 220V, 110V etc.