Swaroser Kid's Winter thick Warm Waterproof Hat with Removeable Mask MaterialWaterproof Polyester outside, warm thick cashmere inside For teenage boys and girls Specialize Kids can walk and play outdoor int the cold wet rain or snow weather Head circumferenceSmall:20.48-21.33inch,Medium: 21.67-22.85inch,Large:23.25-24.82inch Perfect gift for kids in winter