雞仔嘜保暖內衣同羊毛內衣 is really good quality.
those material come from Europe.
羊毛內衣 's material is come from Italy, and is machine washable. they could keep you warm. however, if you afraid that is too warm, you could but their thinner one.
「雪花牌」is not work certainly. as they are really bad quality!