I bought this as a gift for a friend, but I'm no longer in contact with them, so I'm selling it (lol). Heat the silica gel bag in the microwave! Set it in the cat cover for a warm, comforting cat-shaped warmer. You can apply it to your stomach or back, or use it as a companion while sleeping. You'll be soothed by the fluffy, soft fur material. [Heating Time] When using a 500W microwave: about 30 seconds When using a 600W microwave: about 20 seconds