★★★ Silk is one of the best material for underwear,the womens silk long underwear is super soft,smoothly and lightweight,Silk fabric is also very breathable and antistatic,it's good for skin health,as the thermal underwear or base layer for cold weather ,great to be wear alone at Home or outdoors add an extra Layer of Warmth Under Your Clothes,It is also a grear gift for mother, sisters and girlfriend.