This hand warmer provides gentle warmth when heated in the microwave. Simply remove the silica gel pouch from the cover and heat it in the microwave! Heating it for 30 seconds in a 500-600W household microwave will provide warmth for about 20 minutes. Perfect for short outings, commutes, and going to school. The cover is hand-washable, allowing for repeated use and making it economical. [Materials] Cover: 100% Polyester; Inner Bag: 80% Polyester, 20% Cotton Filling: Silica Gel [Size] Approximately H10 x W12 x D2.5cm [Country of Origin] China [Sold by] Kamio Japan Co., Ltd. #Lifelike #LifelikeMOOMIN #LifelikeMOOMINWarmSeries