Heating non-charging two-purpose baking oil cap

Name: Korean safety helmet
Dimensions: length 27CM, thickness 2.5CM
Content: Environmentally friendly biogel 100% safe and non-toxic
Heating method: no need to plug in
Hyperthermia: microwave heating for 1-2 minutes
Cold treatment: Put it in the refrigerator for 1-2 hours. It can be used to treat hair with ice treatment during the day. It has no wires and no restraints. The rubber shrinks evenly when heated. The size can be any size. You can enjoy the time. The inner tank has long-lasting temperature control without secondary heating. Made of non-woven fabric and waterproof material, it is very outstanding in waterproof.