The Heat Feet Slippers are the ultimate in comfort. Simply remove the tourmaline bead pack and heat it in a turn style microwave for one minute. Slide into the bottom above the sole, put on and kick back. The heat will filter through your feet to warm the rest of your body. Packaged in a cardboard gift box. One size fits most (23cm x 21cm). ** Please note: Only heat up in a clean, turn style microwave, not suitable for flatbed microwaves.**