Silk is one of the best material for underwear,the silk thermal underwear sets is Soft ,comfortable and lightweight,Silk fabric is also very breathable and antistatic,it's good for skin health,as thermal underwear or base layer for women ,Great to be Wear Alone at Home or Add an Extra Layer of Warmth Under Your Clothes. Update Size details of dress as below: Small size: Chest:35"-37", Top Length: 23". Pants outseam: 38", Elastic Waist: 25"-32". Medium size: Chest 37"-39", Top Length: 24". Pants outseam: 39", Elastic Waist: 28"-32". Large size: Chest 39"-43" , Top Length: 24". Pants outseam: 40",Elastic Waist: 29"-35".Silk is one of the best material for underwear,the silk thermal underwear sets is Soft ,comfortable and lightweight,Silk fabric is also very breathable and antistatic,it's good for skin health,as thermal underwear or base layer for women ,Great to be Wear Alone at Home or Add an Extra Layer of Warmth Under Your Clothes. Update Size details of dress as below: Small size: Chest:35"-37", Top Length: 23". Pants outseam: 38", Elastic Waist: 25"-32". Medium size: Chest 37"-39", Top Length: 24". Pants outseam: 39", Elastic Waist: 28"-32". Large size: Chest 39"-43" , Top Length: 24". Pants outseam: 40",Elastic Waist: 29"-35".