It Is Asian Size (Small 2 Size), recommended to buy Bigger Size Than Usually!2 Pcs thermal set they are ultra soft, warm, comfortable and great to wear at home or add an extra layer of warmth under your clothes.Made from Ultra-Soft polyester and spandex, the four way stretch material provides a comfortable fitPerfect for indoor/outdoor winter activities,such as cycling, skiing, climbing, running, snowboarding, yoga, fitness body training etc