a.flannelette fabric, soft and smooth hand feeling; b.short charging, long time warming; c.Pillow shape; d.compertitive price Electric warmwater bag, hot water bag ,warmer bag;1)Quickly warm --5minites charge, 2-5hours warm keeping ;2)Comfortable hand feel;3)Explosing proof and automatically swith off;4)Color option: Orange/Red/ Purple/ Lithgt Blue;5)Rechargeable, no need to refill water