hot & cold pack, cold pack Cool Use 1.Store hot & cold pack in freezer for at least two hours. 2.Wipe the hoarfrost from the hot & cold pack before use. 3.Place the hot & cold pack mask against forearm to check for desired temperature. Hot Use 1.Place the hot & cold pack in the heated water for 10 minutes. 2.Remove the hot & cold pack from water with a tong,wipe try. 3.Place the hot & cold pack against forearm to check for desired temperature,if too hot let it cool. Packing: each in PPbag,30pcs/inner box,60pcs/outer box. Meas:35*35*24CM G.W.:12KG